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CN3704
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ShangHai Consonance Elec Battery Management, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownCN3704
ShangHai Consonance Elec · Battery Management · TSSOP-16
CN3704 from ShangHai Consonance Elec, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VG | power_out | Internal voltage modulator output that supplies the internal driver circuits, with a 100nF capacitor required between VG and VCC. |
| 2 | PGND | power_in | Power ground for the high-current switching path, to be returned separately from the analog ground. |
| 3 | GND | power_in | Analog ground that also provides a heat-dissipation path, so its copper area should be made as large as possible. |
| 4 | CHRG | output | Open-drain output that is pulled low during charging and is high-impedance in other states (drive a LED through a pull-up; up to 25V in charge-complete mode leakage is 1uA max). |
| 5 | DONE | output | Open-drain output that is pulled low in the charge-complete state and is high-impedance in other states (leakage 1uA max at 25V in charge mode). |
| 6 | TEMP | input | Battery temperature monitor input; a negative-temperature-coefficient thermistor (10kΩ at 25°C) is connected between TEMP and GND, with a 50uA pull-up and comparator thresholds of 1.61V high and 0.175V low. |
| 7 | EOC | input | End-of-charge current setting pin, connected directly to GND or through a resistor to GND, where Rext must not exceed 100kΩ or charge will not terminate correctly. |
| 8 | COM1 | passive | Loop compensation input 1, which requires a 470pF capacitor to GND. |
| 9 | COM2 | passive | Loop compensation input 2, which requires a 120Ω resistor in series with a 220nF capacitor to GND. |
| 10 | test | input | Test pin that must be connected to GND. |
| 11 | COM3 | passive | Loop compensation input 3, which requires a 100nF ceramic capacitor to GND. |
| 12 | NC | unconnected | No internal connection. |
| 13 | CSP | input | Positive charge-current sense input that, together with BAT across the sense resistor RCS, sets the constant charge current at 200mV/RCS and must be connected directly to RCS. |
| 14 | BAT | input | Battery voltage sense input and negative charge-current sense input that, with the internal divider and reference, regulates the constant-voltage charge at 16.8V ±1%. |
| 15 | VCC | power_in | External supply input (7.5V to 28V) that also powers the internal circuits and needs a filter capacitor to GND; absolute maximum is -0.3V to 30V. |
| 16 | DRV | output | Gate drive output for the external P-channel MOSFET, with the low level clamped to about 8V (max) below VCC. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ShangHai Consonance Elec |
| Package | TSSOP-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| VCC, VG, DRV, CHRG, DONE to GND voltage | -0.3 | 30 | V | to GND | 3 | ||
| CSP, BAT to GND voltage | -0.3 | 28 | V | to GND | 3 | ||
| COM3 to GND voltage | 6.5 | V | to GND | 3 | |||
| Other pins to GND voltage | -0.3 | V | to GND; upper limit printed as VCOM3+0.3V | 3 | |||
| Storage temperature | -65 | 150 | ℃ | 3 | |||
| Operating ambient temperature | -40 | 85 | ℃ | 3 | |||
| Soldering temperature | 300 | ℃ | 10 s | 3 | |||
| Input voltage range | VCC | 7.5 | 28 | V | 4 | ||
| Undervoltage lockout threshold | UVLO | 4.2 | 6 | 7.3 | V | 4 | |
| Chip operating current | IVCC | 1.4 | 1.95 | 2.5 | mA | VBAT>VREG | 4 |
| Regulation voltage | VREG | 16.632 | 16.8 | 16.968 | V | 恒压充电模式 | 4 |
| Current sense voltage | VCS | 190 | 200 | 210 | mV | VBAT>5.6V, VCSP-VBAT | 4 |
| Current sense voltage | VCS | 18 | 30 | 42 | mV | VBAT<5.6V, VCSP-VBAT | 4 |
| Current into BAT pin | IBAT | 15 | 25 | uA | 充电结束模式或睡眠模式 | 4 | |
| Trickle charge threshold | VPRE | 10.8 | 11.2 | 11.6 | V | BAT pin voltage rising | 4 |
| Overvoltage threshold | Vov | 1.06 | 1.08 | 1.1 | 电池电压上升 | 4 | |
| Overvoltage release threshold | Vclr | 0.98 | 1 | 1.02 | 电池电压下降 | 4 | |
| TEMP pin pull-up current | Iup | 41 | 50 | 65 | uA | 4 | |
| Comparator high threshold | Vthh | 1.57 | 1.61 | 1.65 | V | TEMP pin voltage rising | 4 |
| Comparator low threshold | Vthl | 0.145 | 0.175 | 0.205 | V | TEMP pin voltage falling | 4 |
| CHRG pin pull-down current | ICHRG | 7 | 12 | 18 | mA | VCHRG=1V，充电模式 | 4 |
| CHRG pin leakage current | ILK1 | 1 | uA | VCHRG=25V，充电结束模式 | 4 | ||
| DONE pin pull-down current | IDONE | 7 | 12 | 18 | mA | VDONE=1V，充电结束模式 | 4 |
| DONE pin leakage current | ILK2 | 1 | uA | VDONE=25V，充电模式 | 4 | ||
| Oscillator frequency | fosc | 240 | 300 | 360 | kHZ | 4 | |
| Maximum duty cycle | Dmax | 94 | % | 4 | |||
| Sleep threshold (VCC-VBAT) | VSLP | 0.06 | 0.1 | 0.14 | V | VBAT=8V; VCC falling | 4 |
| Sleep threshold (VCC-VBAT) | VSLP | 0.1 | 0.14 | 0.18 | V | VBAT=12V; VCC falling | 4 |
| Sleep threshold (VCC-VBAT) | VSLP | 0.18 | 0.23 | 0.28 | V | VBAT=18V; VCC falling | 4 |
| Sleep release threshold (VCC-VBAT) | VSLPR | 0.26 | 0.32 | 0.39 | V | VBAT=8V; VCC rising | 4 |
| Sleep release threshold (VCC-VBAT) | VSLPR | 0.32 | 0.42 | 0.52 | V | VBAT=12V; VCC rising | 4 |
| Sleep release threshold (VCC-VBAT) | VSLPR | 0.38 | 0.47 | 0.58 | V | VBAT=18V; VCC rising | 4 |
| DRV low level (VCC-VDRV) | VL | 5 | 6.5 | 8 | V | IDRV=0mA | 4 |
| DRV high level (VCC-VDRV) | VH | 60 | mV | IDRV=-10mA | 4 | ||
| DRV rise time | tr | 30 | 40 | 65 | ns | Cload=2nF, 10% to 90% | 4 |
| DRV fall time | tf | 30 | 40 | 65 | ns | Cload=2nF, 90% to 10% | 4 |
| Recharge threshold | VRE | 16 | V | BAT pin voltage falling | 4 | ||
| Trickle charge threshold hysteresis | HPRE | 0.4 | V | BAT pin voltage falling | 4 |
CAD (KiCad official)
- Symbol:
CN3704 - Footprint:
Package_SO:TSSOP-16_4.4x5mm_P0.65mm - 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files:
cn3704-etched.step/cn3704-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cn3704.step/cn3704.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ShangHai Consonance Elec datasheet (11 pp, sha256
ca89e858f5e1cfad, retrieved 2026-10-19, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).