CN3703 from ShangHai Consonance Elec, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VG	power_out	Internal voltage regulator output. Supplies power to the internal gate-drive circuitry. Connect a 100 nF ceramic capacitor between VG and VCC.
2	PGND	power_in	Power ground return for the high-current gate-drive circuitry.
3	GND	power_in	Analog ground reference for the internal control circuitry.
4	CHRG	output	Open-drain charge-status output (active-low). Internal transistor pulls this pin low while charging; high-impedance otherwise. Sink current typ. 12 mA at V_CHRG=1V; leakage <1 uA at 25V.
5	DONE	output	Open-drain end-of-charge status output (active-low). Internal transistor pulls this pin low when charging terminates; high-impedance otherwise. Sink current typ. 12 mA at V_DONE=1V; leakage <1 uA at 25V.
6	TEMP	input	Battery temperature-sense input. Connect an NTC thermistor (10 kΩ at 25°C) between TEMP and GND. Internal 50 uA pull-up; upper threshold 1.61 V, lower threshold 0.175 V.
7	EOC	input	End-of-charge current programming input. Connect a resistor R_ext from EOC to GND (or short to GND) to set the termination current: I_EOC = 1.278×(14350+R_ext)/(R_CS×1e6). R_ext must be ≤100 kΩ.
8	COM1	passive	Loop compensation input 1. Connect a 470 pF capacitor between COM1 and GND.
9	COM2	passive	Loop compensation input 2. Connect a 120 Ω resistor in series with a 220 nF capacitor between COM2 and GND.
10	test	input	Test pin. Must be tied to GND in normal operation.
11	COM3	passive	Loop compensation input 3. Connect a 100 nF capacitor between COM3 and GND. Absolute max voltage to GND is 6.5 V.
12	NC	unconnected	No internal connection.
13	CSP	input	Charge-current sense positive input. Together with BAT, senses the voltage across the external current-sense resistor R_CS to regulate the charging current (V_CS = 200 mV typ; I_CH = 200 mV / R_CS).
14	BAT	input	Battery voltage-sense input and current-sense negative input. Internal precision resistor divider and reference set the 12.6 V constant-voltage float level. Also serves as the return for the CSP current-sense measurement.
15	VCC	power_in	External supply input (7.5-28 V) and also the internal circuit's supply rail. Decouple to GND with a bulk/filter capacitor. UVLO threshold ~6 V typical.
16	DRV	output	Gate-drive output for the external P-channel power MOSFET. Referenced to VCC: V_H ≈ VCC−60 mV (I=−10 mA), V_L ≈ VCC−6.5 V (I=0 mA). PWM switching frequency 300 kHz typ, max duty 94%.

Key specifications

Parameter	Value
Manufacturer	ShangHai Consonance Elec
Package	TSSOP-16
Category	PMIC
Pins	16

Ordering variants

Same part, different packaging or reel option.

CN3703

CAD (KiCad official)

Symbol: CN3703
Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
3D model: TSSOP-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`cn3703.step`	205 KB	You want the bare part, or you mark your own boards.
`cn3703-etched.step`	1.9 MB	You want the part with `CN3703` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 479 faces against 255 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: ShangHai Consonance Elec datasheet (11 pp, sha256 86648ccf3673c5c3, retrieved 2026-08-17, 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: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF