← SY-BAEK
KO EN 中 HI

IMSAK POWER START

18V Supercapacitor Hybrid Jump Starter

Production Ready 18V Hybrid ATtiny1614 MCU
400A
Peak Cranking
18s
Supercap Charge
1M+
Cycle Lifespan
-40°C
Extreme Operating Temp

01 Product Overview

IMSAK POWER START is a hybrid jump starter combining a 6S supercapacitor bank with a 4S1P 18650 lithium-ion battery. By leveraging the supercap's instantaneous high-current discharge capability and the lithium battery's energy storage capacity simultaneously, it ensures reliable vehicle cranking even in extreme environments.

START 12.6V IMSAK POWER START 12V 400A PEAK USB START Button 7-Seg Voltage Display Status LED (G/B/R) Grip Rib Pattern USB 5V/4.6A x 2 Ports 137mm 113.2mm 102mm

Hybrid Design

Dual power: supercap (instant high current) + lithium (energy storage) for complementary operation

Extreme Environment Operation

Full range operation from -40°C to +65°C. Supercaps suffer no performance degradation in sub-zero temperatures

Premium Case

137 x 102 x 113.2mm, precision 3D printed case. Insert nuts + O-ring waterproofing

02 Core Specifications

Available in two configurations: 200F Lightweight and 350F High-Power. Both use the same case and PCB, differing only in supercapacitor capacity.

Spec 200F Lightweight 350F High-Power
Supercap Config 6S x 200F (BCAP0200) 6S x 350F (BCAP0350)
Stored Energy 4,374J (1.2Wh) 7,654J (2.1Wh)
Peak Current 400A 400A
Cranking Duration 3 sec 5 sec
Starts Per Charge ~20 starts/charge ~30 starts/charge
Supercap Charge Time 18 sec 30 sec
Battery Charge Time 90 min 90 min
Operating Temp -40 ~ 65°C -40 ~ 65°C
Lifespan (Cycles) 1,000,000+ 1,000,000+
USB Output 5V / 4.6A (2 ports) 5V / 4.6A (2 ports)
Weight ~850g ~1,100g
Dimensions 137 x 102 x 113mm 137 x 102 x 113mm
Manufacturing Cost ₩88,000 ($65) ₩106,000 ($79)
Target Price ₩148,000 ₩198,000

200F Lightweight Margin

Cost ₩88,000 → Price ₩148,000

Margin 68%

350F High-Power Margin

Cost ₩106,000 → Price ₩198,000

Margin 87%

03 Competitor Comparison

Comparison of key specifications against major jump starter products on the market. IMSAK POWER START combines the advantages of both supercap and lithium with its hybrid approach.

Spec IMSAK PS NOCO GB40 HULKMAN Alpha85 Fanttik T8 Autowit SC2
Type Supercap+Lithium Lithium Lithium Lithium Supercap Only
Peak Current 400A 1000A 2000A 1500A 800A
Operating Temp -40°C -20°C -15°C -10°C -40°C
Charge Time 18 sec+90 min 3 hours 2 hours 2.5 hours Instant (vehicle)
USB Output 5V 4.6A 5V 2.4A 5V 3A 5V 2.4A None
Lifespan 1M cycles 500 cycles 500 cycles 500 cycles 1M cycles
Price $120-180 $125-250 $100-140 $80-110 $89-130
Display 7-seg 4-digit LED bar 3.3" LCD OLED LED segment
✓

IMSAK Strengths

Extreme Low-Temp Operation (-40°C)

Lithium-only products limited to -10~-20°C. IMSAK starts instantly at -40°C thanks to supercaps

1M cycles Cycle Lifespan

Lithium 500 cycles vs Supercap 1,000,000 cycles. Virtually permanent use

Ultra-Fast Supercap Charge (18 sec)

Lithium requires 2~3 hours vs Supercap ready in just 18 seconds

USB 5V/4.6A Dual Port

Best-in-class USB output among competitors. Capable of fast-charging tablets

⚠

Considerations

Peak Current 400A

May be insufficient for large SUVs/trucks. Targets passenger cars (2.0L and under) and small diesels

Price Range $120-180

Same or slightly higher than lithium-only. Differentiation needed through quality and lifespan

Initial Brand Awareness

As a new brand, lower recognition vs NOCO/HULKMAN. Marketing strategy is critical

4. Power Architecture

Complete power flow — from input to cranking output

LEGEND VBAT (14.8V) VBOOST (16.8V) V3V3 (3.3V) 5V USB VCAP+ (16.2V max) Sense / Signal Input Sources AC 220V 16.8V/2A Charger Car 12V XL6009 Boost 16.8V DC Jack J2 4S BMS Module External 4S BMS 3.7V 3.7V 3.7V 3.7V 4× 18650 = 14.8V (VBAT) Samsung INR18650-25R Charge VBAT 14.8V V3V3 3.3V VBOOST 16.8V 5V USB VCAP+ 16.2V max AMS1117-3.3 (U5) LDO: VBAT → 3.3V MT3608 (U3) Boost: VBAT → 16.8V (Supercap Charge) XL4015 (U6) Buck: VBAT → 5V (USB Output) ATtiny1614 (U1) VCC ← V3V3 PA3 → VCAP_SNS (ADC) PA4 → GATE_IN PA5 ← BTN/START PA6 → LED_G PA7 → LED_B PB0 → LED_R PB1 → BUZ PA1,PA2 → TM1637 PA0 → UPDI VCAP_SNS TC4427 (U4) Gate Driver GATE_IN 14V Gate 4× IRFS3077 Q1-Q4 Parallel Q1 Q2 Q3 Q4 RDS(on) 3.3mΩ ea Total: 0.83mΩ Loss: 0.13W @400A J7 Output 400A → Vehicle Battery USB-A Output J8 USB J9 USB PTC F1 PTC F2 Supercap Bank — 6S Series C1 2.7V C2 2.7V C3 2.7V C4 2.7V C5 2.7V C6 2.7V 200F or 350F each | Balancing: 10Ω + 2.7V Zener per cell Total: 6 × 2.7V = 16.2V max Charge Path Discharge → Charge: AC/Car → BMS → Battery → MT3608 → Supercap | Crank: Supercap → MOSFETs → Vehicle
Power Flow Summary
Charge: AC 220V or Car 12V → 16.8V → 4S BMS → 18650 (14.8V) → MT3608 Boost → Supercap Bank (16.2V)
Crank: Supercap (16.2V, 400A) → 4× IRFS3077 → Vehicle Battery
USB: 18650 → XL4015 Buck → 5V/3A USB-A × 2
Logic: 18650 → AMS1117 LDO → 3.3V → ATtiny1614

5. Supercap Bank Circuit

6S Series Supercap — Cell Balancing Details

6S Supercap Bank — Cell Balancing Circuit VCAP+ GND MT3608 VBOOST MOSFETs Q1-Q4 C6 200F/350F 10Ω 2.7V 16.2V 13.5V C5 10Ω 2.7V 13.5V 10.8V C4 10Ω+Z 10.8V 8.1V C3 10Ω+Z 8.1V 5.4V C2 10Ω+Z 5.4V 2.7V C1 10Ω+Z 2.7V 0V Voltage Ladder 16.2V VCAP+ C6 top 13.5V C6/C5 10.8V C5/C4 8.1V C4/C3 5.4V C3/C2 2.7V C2/C1 0V GND Per-Cell Balancing 10Ω resistor: passive bleed 2.7V zener: overvoltage clamp
Supercap Balancing
Each cell has a parallel 10 ohm resistor + 2.7V zener diode. During charging, if any cell exceeds 2.7V the zener conducts and the resistor bleeds excess current, preventing overvoltage damage. This passive balancing ensures all 6 cells charge evenly to 2.7V each, giving a stable 16.2V total.

6. MOSFET Switching Circuit

Cranking output — 400A high-current switching path

VCAP+ (16.2V) Q1 IRFS3077 D S G 3.3mΩ Q2 IRFS3077 3.3mΩ Q3 IRFS3077 3.3mΩ Q4 IRFS3077 3.3mΩ 100A 100A 100A 100A J7 Output Cranking Jack Vehicle Battery 12V Lead-Acid 400A ATtiny1614 (U1) PA4 = GATE_IN 3.3V logic TC4427 (U4) Gate Driver 14V Gate Drive R7=10kΩ GND RDS(on) Calculation Per MOSFET: 3.3mΩ 4 parallel: 3.3/4 = 0.825mΩ total P = I² × R = 400² × 0.000825 = 132W (peak) ~0.13W steady @400A Current Flow Path Supercap Bank → VCAP+ Rail → MOSFET Drains → MOSFET Sources → J7 → Vehicle Battery → GND Cranking Sequence BTN press → ATtiny checks VCAP > 12V → PA4 HIGH → TC4427 → Gates 14V → MOSFETs ON → 400A flows Duration: 3-5 seconds max | Auto-shutoff if VCAP drops below 8V
MOSFET Specs (IRFS3077)
VDS: 75V | ID: 120A (per device)
RDS(on): 3.3mΩ @ VGS=10V
Package: D2PAK (TO-263)
4 parallel = 480A max capacity
Gate Driver (TC4427)
Dual MOSFET driver, 1.5A peak gate current
Input: 3.3V logic from ATtiny
Output: VBAT-referenced (14V gate drive)
Rise/Fall: 30ns typical

7. MCU Pinout — ATtiny1614

SOIC-14 Package pin assignment and peripheral connections

Pin 1 ATtiny1614 SOIC-14 20MHz / 16KB Flash 2KB SRAM / 256B EEPROM 1 VCC 2 PA4 3 PA5 4 PA6 5 PA7 6 PB3 7 PB2 8 PB1 9 PB0 10 PA0 11 PA1 12 PA2 13 PA3 14 GND 3.3V (V3V3) from AMS1117 GATE_IN → TC4427 Gate Driver BTN / START Momentary Switch LED Green Charged / Ready LED Blue Charging PB3, PB2 Spare / Future (I2C alt, UART alt) GND Power Ground VCAP_SNS (ADC) Voltage Divider 1:6 TM1637 CLK 4-Digit Display TM1637 DIO 4-Digit Display UPDI Programming Header LED Red Low Voltage / Error Piezo Buzzer PWM Audio Alerts Pin Usage Summary Power: VCC(1), GND(14) Output: GATE(2), LED_G(4), LED_B(5), LED_R(9), BUZ(8) Input: BTN(3), VCAP_ADC(13) | Comm: DIO(11), CLK(12) | Prog: UPDI(10) | Spare: PB3(6), PB2(7)
Pin Port Net Name Direction Function Notes
1 VCC V3V3 PWR 3.3V Power Input 100nF bypass cap to GND
2 PA4 GATE_IN OUT MOSFET Gate Control → TC4427 input, 3.3V logic
3 PA5 BTN / START IN Start Button (active LOW) Internal pull-up, 100nF debounce
4 PA6 LED_G OUT Green LED (Ready) 470R series, sink 6mA
5 PA7 LED_B OUT Blue LED (Charging) 470R series, sink 6mA
6 PB3 - - Spare Alt: I2C SCL, future sensor
7 PB2 - - Spare Alt: I2C SDA, future sensor
8 PB1 BUZ OUT Piezo Buzzer (PWM) TCA0 WO1, 2-4kHz tones
9 PB0 LED_R OUT Red LED (Error/Low) 470R series, sink 6mA
10 PA0 UPDI I/O Programming Interface 4.7kΩ pull-up, J3 header
11 PA1 DIO (TM1637) I/O 7-Segment Data Line Bit-bang protocol, open-drain
12 PA2 CLK (TM1637) OUT 7-Segment Clock Line ~50kHz clock, push-pull
13 PA3 VCAP_SNS IN (ADC) Supercap Voltage Sense 1:6 divider (100k/20k), 10-bit ADC
14 GND GND PWR Ground Reference Star ground to power plane
ADC Configuration (VCAP_SNS)
Voltage divider: R_top=100kΩ, R_bot=20kΩ
Ratio: 20/(100+20) = 1/6
VCAP 16.2V → ADC 2.7V (within 3.3V ref)
10-bit ADC: 0.016V resolution per step
Reading: VCAP = ADC_value × 3.3 / 1024 × 6
TM1637 Display
4-digit 7-segment LED display module
Protocol: Custom 2-wire (not I2C)
Shows: Supercap voltage (e.g., "16.2")
Brightness: 8 levels, auto-dim at night
Update rate: 2Hz during charge, 10Hz during crank

8. Firmware State Machine

The ATtiny1614 firmware operates as a finite state machine (FSM) with 5 states. Each state independently controls LEDs, buzzer, display, and MOSFET output.

ST_IDLE Display voltage, check button LED: Blue ON ST_ARMED Button held 500ms LED: Blue ON, Buzzer beep ST_CRANKING MOSFET ON, 400A output LED: Red ON — Max 5 sec ST_COOLDOWN Mandatory 10s rest LED: Green blink • "C-10"..."C-01" ST_LOW_BATT VCAP < 10V LED: Green blink • "-LO-" • Buzzer Button press (VCAP≥10V) VCAP < 10V Hold 500ms Button release Button release OR 5s timeout VCAP < 8V (brownout) 10s elapsed 2s elapsed LEGEND: Active transition Return / timeout LED indicator IDLE ARMED CRANKING COOLDOWN LOW_BATT
FSM Design Principles: All state transitions are unidirectional, and abnormal terminations (brownout, timeout) must pass through a safe state (COOLDOWN or LOW_BATT) before returning to IDLE. There is no direct transition from CRANKING to IDLE.

9. TM1637 Display Modes

The 4-digit 7-segment display (TM1637) uses different display modes for each state. The colon (:) blinks at 500ms in IDLE and stays solid in ARMED.

ST_IDLE Voltage display — colon blinks 500ms 12.5 V ST_ARMED Voltage display — colon solid 12.5 V — READY ST_CRANKING Voltage drop display — max brightness 11.2 V — CRANKING (max brightness) ST_COOLDOWN Countdown timer — 10s...01s C-05 Cooldown 5s remaining ST_LOW_BATT Low voltage warning — full flash -LO- Low Battery Warning (flashing)

TM1637 Control Specifications

Comm 2-wire (CLK + DIO), bit-bang

Brightness 8 levels (0x88~0x8F), CRANKING = max

Update 200ms interval (CRANKING: 100ms)

Decimal Voltage decimal via Digit 2 DP bit

Colon Digit 2 bit7 (0x80) toggle

Current Draw < 80mA (all segments lit)

10. Safety Features

IMSAK Power Start protects users and equipment through 8 independent safety mechanisms. Software triple (hold/timer/ADC) + Hardware triple (PTC/guard ring/gasket) architecture.

Safety Feature Implementation Threshold Action Description
Hold-to-Start 500ms button hold 500ms Accidental prevention Button must be held for 500ms+ to transition from ST_ARMED to ST_CRANKING. Momentary touches cannot trigger cranking.
Auto Cutoff Hardware Timer 5 sec Over-discharge protection 5-second timer starts upon entering CRANKING state. On timeout, MOSFET is forced OFF and transitions to COOLDOWN.
Low Voltage Protection ADC Monitoring <10V start blocked Damage prevention When VCAP < 10V, transitions from ST_IDLE to ST_LOW_BATT. Blocks cranking entry entirely to protect cells.
Brownout Protection Real-time ADC <8V immediate stop Cell protection If VCAP drops below 8V during cranking, MOSFET immediately turns OFF. Prevents permanent damage from supercap over-discharge.
Forced Cooldown Software Timer 10s wait Overheating prevention 10-second mandatory wait after cranking ends. Ensures heat dissipation time for MOSFETs, wiring, and supercaps.
PTC Fuse Self-resetting Fuse 2.5A/port USB overcurrent 2.5A PTC fuse on each USB-A port. Auto-trips on overcurrent, auto-resets after temperature recovery.
Button Guard Ring Physical Ring Ø22mm ring Accidental actuation prevention 3mm-high guard ring around START button. Prevents accidental presses in pockets/bags.
Gasket Groove Silicone Gasket IP44+ Waterproof 1.5mm gasket groove on upper/lower shell mating surface. Silicone O-ring insertion prevents rain/dust intrusion.
Safety Rating: IEC 62133 (lithium battery safety), KS C IEC 61000 (EMC) standards. KC certification required for mass production (household electrical appliances).

11. Case 3D Design

137 x 102 x 113.2mm 2-part clamshell structure. Based on 3D printed (PLA/PETG) prototype. Below is a cross-section along the 137mm width direction.

Parting Line Gasket groove Main PCB (110 x 70mm, FR4 2-layer) MCU TC4427 4xMOS Boost Buck 18650 18650 18650 18650 4S BMS Top Shell — Main Board + 4S Battery Height: 35mm 200F/350F 200F/350F 200F/350F Ø33x60mm Ø33x60mm Ø33x60mm Bottom Shell — 6S SuperCap Bank Height: 62mm • 3+3 stacked arrangement START START btn 12.5 Display LEDs USB-A x2 DC Jack Grip ribs Grip ribs Rubber feet (x4) 137 mm 113.2 mm 35mm 62mm Depth: 102 mm (into page)

Premium Feature List (15 items)

01 2-Part Clamshell Structure

02 M3 Insert Nuts x4

03 Silicone Gasket Groove (IP44)

04 Ergonomic Grip Ribs

05 Ø22mm Button Guard Ring

06 TM1637 Display Window

07 RGB LED Light Pipe

08 Bulkhead DC Jack Mount

09 Recessed USB-A Ports x2

10 Ventilation Louvers (Side)

11 18650 Snap-Fit Cradle

12 Supercap 3+3 Alignment Ribs

13 PCB Standoffs x4

14 Non-Slip Rubber Feet x4

15 Cable Strain Relief

12. BOM Summary (Bill of Materials)

Complete parts list for both 200F Lightweight and 350F High-Power configurations. Unit prices based on 2026 domestic small-lot (10pcs) purchasing.

12-1. Main Board BOM

Component Model Package Qty Unit Price Subtotal Function
MCU ATtiny1614 SOIC-14 1 ¥2,500 ¥2,500 Control/Monitor
Gate Driver TC4427CPA SOIC-8 1 ¥2,000 ¥2,000 MOSFET Drive
LDO AMS1117-3.3 SOT-223 1 ¥800 ¥800 3.3V Supply
Boost MT3608 SOT-23-6 1 ¥1,200 ¥1,200 Supercap Charge
Buck XL4015E1 TO-263-5L 1 ¥1,800 ¥1,800 USB 5V
MOSFET IRFS3077 D2PAK 4 ¥1,000 ¥4,000 Cranking Switch
Schottky SS34 SMA 1 ¥300 ¥300 Boost Diode
Schottky SS54 SMA 1 ¥400 ¥400 Buck Diode
Inductor 22µH 12mm 1 ¥1,000 ¥1,000 Boost
Inductor 33µH 12mm 1 ¥1,000 ¥1,000 Buck
Resistors Various 0805 8 ¥250 ¥2,000 Divider/Pull-up
Capacitors Various 0805 8 ¥375 ¥3,000 Filter
LED R/G/B 0805 3 ¥500 ¥1,500 Status Indicator
Buzzer Piezo 5V 12mm 1 ¥1,000 ¥1,000 Alert Sound
DC Jack PJ-002A THT 1 ¥1,200 ¥1,200 Charge Input
USB-A Type A THT 2 ¥800 ¥1,600 Charge Output
PTC Fuse 2.5A 1206 2 ¥400 ¥800 USB Protection
Button Tactile 6mm 1 ¥500 ¥500 START
PCB FR4 2-layer 110x70 1 ¥3,000 ¥3,000 PCB Board
Main Board Subtotal 39 ¥29,600

12-2. Supercap Bank BOM

Component Model Qty Unit Price Subtotal
200F SuperCap BCAP0200 2.7V 6 ¥5,000 ¥30,000
350F SuperCap BCAP0350 2.7V 6 ¥8,000 ¥48,000
Balancing R 10Ω 1/4W 6 ¥100 ¥600
Zener 2.7V BZX55C 6 ¥200 ¥1,200
PCB FR4 2-layer 2 ¥2,500 ¥5,000
200F Subtotal ¥36,800
350F Subtotal ¥54,800

12-3. External Components

Component Qty Unit Price Subtotal
4S BMS Module 1 ¥3,000 ¥3,000
18650 Cell (3000mAh) 4 ¥1,500 ¥6,000
TM1637 Display 1 ¥2,000 ¥2,000
16.8V 2A Charger 1 ¥8,000 ¥8,000
Jump Cable Set 1 ¥8,000 ¥8,000
Case (3D Printed) 1 ¥5,000 ¥5,000
External Parts Subtotal ¥32,000

12-4. Total Cost Summary

Configuration Main Board Supercap External Parts Total Target Price Margin %
200F Lightweight ¥29,600 ¥36,800 ¥32,000 ¥98,400 ¥148,000 50.4%
350F High-Power ¥29,600 ¥54,800 ¥32,000 ¥116,400 ¥198,000 70.1%

Cost Analysis

200F Lightweight

Total Cost ¥98,400 → Price ¥148,000

Margin: ¥49,600 (50.4%)

For small cars/bikes. Lightweight advantage.

350F High-Power

Total Cost ¥116,400 → Price ¥198,000

Margin: ¥81,600 (70.1%)

For SUVs/diesel. Multiple start headroom.

Expected cost reduction at scale: At 100pcs, supercaps 30%, ICs/passives 40%, PCBs 50% reduction possible. Estimated 200F mass production cost approx. ¥62,000 (-37% vs current).

13. PCB Layout — Main Board

Main board PCB top-side layout. 12 key components optimally placed on a 110x70mm 2-layer FR4 board. High-current path (MOSFET to output terminal) is designed with shortest distance and wide copper area.

DC IN J2 3.3V LDO U5 AMS1117 C1 C2 ATtiny1614 U1 — SOIC-14 R5 R6 TC4427 U4 Gate Drv J5 UPDI BOOST U3 MT3608 L1 22µH D1 TM1637 J4 Display Q1 Q2 Q3 Q4 IRFS3077 IRFS3077 IRFS3077 IRFS3077 400A MOSFET Array — D2PAK 5V BUCK U6 XL4015 L2 33µH D2 LED1 G LED2 B LED3 R BZ1 Buzzer USB-A J8 USB-A J9 F1 F2 C8 Main Board PCB — 110 × 70 mm, 2-Layer FR4
PCB Design Notes
Q1~Q4 MOSFET area designed with 2oz copper (70um) for 400A peak current handling. Ground pour applied on both sides, with thermal via array placement for heat dissipation. USB ports placed on the right board edge, aligned with case openings.

14. V-Cut Manufacturing Panel

Three boards combined into a single panel during PCB manufacturing to reduce costs. Can be separated by hand along V-Cut lines. Panel size is 130x260mm.

130 mm 260 mm Cap Bank Bottom 130 × 95 mm CAP CAP CAP CAP ① Cap Bank Bottom PCB V Cap Bank Top 130 × 95 mm BUS BAR BUS BAR BUS BAR ② Cap Bank Top PCB V Main Board 110 × 70 mm MCU MOSFET ×4 USB ③ Main Board PCB V-Cut Manufacturing Panel — 130 x 260 mm
V-Cut Advantages
Manufacturing Specifications

15. Supercap Charging Profile

Supercap charging curve driven by the MT3608 boost converter. Starting at 5A in CC (constant current) mode, current gradually decreases once 16.2V is reached in CV (constant voltage) mode.

Supercap Charging Profile (CC/CV) 0 5 10 15 20 25 30 Time (seconds) 0V 3V 6V 9V 12V 15V 18V Voltage (V) 0A 1A 2A 3A 4A 5A Current (A) 10V 2A 200F Full 0.3A 350F Full 0.2A CC Constant Current (5A) CV Constant Voltage (16.2V) Voltage (V) Current (A) Full Charge Points
5A
Max Charge Current
CC mode start point
16.2V
Target Charge Voltage
CV transition voltage
18~30s
Full Charge Time
200F~350F range

16. Project File Structure

Complete project directory structure. Python scripts auto-generate KiCad 9 projects, and OpenSCAD is used for 3D printing case design.

jump_starter/product/
├── CLAUDE.md
├── firmware/
│ └── jump_starter.ino (425lines, ATtiny1614)
├── pcb_generators/ Python 3 → KiCad 9
│ ├── generate_main_board.py (710lines)
│ ├── generate_schematic.py (720lines)
│ ├── generate_cap_bank_dual.py (348lines)
│ ├── generate_cap_bank_schematic.py (480lines)
│ └── generate_panel.py (559lines)
├── main_board/ KiCad project
├── cap_bank/ Supercap bank PCB
├── panel/ V-Cut Manufacturing Panel
├── case_3d/
│ ├── jump_starter_case.scad (22.9KB)
│ └── stl/ bottom 1.2MB + top 1.7MB
├── docs/ BOM docs
└── renders/ 45 PNG images
Firmware
425
lines / Arduino C++
PCB Gen
2,817
lines / Python x5
3D Case
22.9
KB / OpenSCAD
Renders
45
PNG / Visualization

17. Production Roadmap

4-phase roadmap from prototype to mass production. Total 16 weeks, estimated investment approx. 56 million KRW.

PHASE 1
Prototype
2 weeks
Deliverable
5 prototypes
₩800,000
PHASE 2
Testing
2 weeks
Deliverable
Test reports
₩200,000
PHASE 3
Small-Batch Production
4 weeks
Deliverable
500 finished units
₩50,000,000
PHASE 4
Certification/Sales
8 weeks
Deliverable
Sales launch
₩5,000,000
Phase Period Tasks Deliverable Budget
1. Prototype 2 weeks PCB fabrication, Component assembly, Firmware verification 5 prototypes ₩800,000
2. Testing 2 weeks Performance testing, -40°C freezer, safety verification Test reports ₩200,000
3. Small-Batch Production 4 weeks 500 units first run, Packaging design 500 finished units ₩50,000,000
4. Certification/Sales 8 weeks CE/FCC/KC cert, Amazon/Coupang listing Sales launch ₩5,000,000
Total 16 weeks ₩56,000,000

18. Technology Stack Summary

12 key technology components that make up IMSAK Power Start.

MCU Core
ATtiny1614
8-bit AVR, 20MHz, SOIC-14
16KB Flash / 2KB SRAM
Gate Driver Drive
TC4427CPA
6A peak gate drive
Dual MOSFET driver
MOSFETs Power
IRFS3077 ×4
75V, 210A, 3.3mΩ
D2PAK, 400A combined
Boost DC-DC
MT3608
14.8V → 16.8V, 95%
SuperCap charging
Buck DC-DC
XL4015E1
14.8V → 5V, 5A
USB output power
LDO Reg
AMS1117-3.3
MCU power supply
SOT-223, 800mA
SuperCap Energy
Maxwell BCAP
200F / 350F, 2.7V ea.
6S → 16.2V bank
Battery Store
18650 4S1P
14.8V nominal
Li-ion, ~2600mAh
Display UI
TM1637
4-digit 7-segment
Voltage / status
Case Mech
OpenSCAD
PETG 3D print
top + bottom shell
PCB EDA
KiCad 9
Python generated
2,817 lines scripts
Firmware Code
Arduino C++
megaTinyCore
425 lines, UPDI prog