TMI4101A from TMI, in a SSOP-28. 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	CHSE	input	Charger detection pin with an internal pull-up (RCHSE 1800-3000 kΩ), where a charger is detected when the CHSE level is at or below VCHSE (0.6-1.5 V), and the absolute range is VDD-80 V to VDD+0.3 V.
2	CHG	output	Charge MOSFET control output with a source current of 8-12 μA (ICHG, typ. 10 μA) that goes high-impedance during overcharge, over-discharge load-lock, and other protection states, with an absolute range of VDD-80 V to VDD+0.3 V.
3	VM	input	Load detection pin with an internal pull-down (RVM 15-35 kΩ), where a load is detected when the VM level reaches VVM (1.05-1.35 V), and the absolute range is VDD-80 V to VDD+0.3 V.
4	DSG	output	Discharge MOSFET control output whose high level is 11.5-13.5 V when VDD > 13 V or VDD-1 to VDD-0.7 V when VDD < 13 V, and whose low level is at most 0.2 V.
5	CTL	bidirectional	DSG output control pin with priority over the internal protection circuit, where GND forces DSG low and CHG high-impedance, and floating gives normal operation; its absolute range is GND-0.3 V to 5.5 V.
6	DS	bidirectional	Test pin that shortens the delay times, with a test-high level of 3.5-4.5 V and a test-low level of 0-0.3 V, and an absolute range of GND-0.3 V to 5.5 V.
7	DSD	bidirectional	Connection pin for the external capacitor that sets the over-discharge protection delay, giving tUV of 1.0-2.0 s with a 0.1 μF ±10% capacitor, and an absolute range of GND-0.3 V to 5.5 V.
8	CDC	bidirectional	Connection pin for the external capacitor that sets the discharge over-current 1 and 2 delays, giving tDOC1 of 0.5-1.5 s with a 0.1 μF ±10% capacitor, and an absolute range of GND-0.3 V to 5.5 V.
9	TS1	input	Temperature resistor connection pin, for which the datasheet recommends an NTC 103AT (β = 3435), and an absolute range of GND-0.3 V to 5.5 V.
10	TS0	input	Temperature resistor connection pin, for which the datasheet recommends an NTC 103AT (β = 3435), and an absolute range of GND-0.3 V to 5.5 V.
11	RSENP	input	Positive input of the current-sense pair used for discharge, charge, and short-circuit detection, with an absolute range of GND-0.3 V to 5.5 V.
12	RSENN	input	Negative input of the current-sense pair used for discharge, charge, and short-circuit detection, with an absolute range of GND-0.3 V to 5.5 V.
13	SEL0	input	7/8/9/10-cell application select pin, where VSELH is VDD-0.6 to VDD-0.1 V and VSELL is at most 0.6 V, and the absolute range is GND-0.3 V to VDD+0.3 V.
14	SEL1	input	7/8/9/10-cell application select pin, where VSELH is VDD-0.6 to VDD-0.1 V and VSELL is at most 0.6 V, and the absolute range is GND-0.3 V to VDD+0.3 V.
15	VS	power_in	Mode selection pin whose function the datasheet gives only as 模式选择 (mode selection), with an absolute range of GND-0.3 V to 5.5 V.
16	GND	power_in	Power ground connection pin, the reference for the device.
17	VC1	input	Positive terminal connection for cell 1, with an absolute range of GND-0.3 V to VDD+0.3 V.
18	VC2	input	Positive terminal connection for cell 2, with an absolute range of GND-0.3 V to VDD+0.3 V.
19	VC3	input	Positive terminal connection for cell 3, with an absolute range of GND-0.3 V to VDD+0.3 V.
20	VC4	input	Positive terminal connection for cell 4, with an absolute range of GND-0.3 V to VDD+0.3 V.
21	VC5	input	Positive terminal connection for cell 5, with an absolute range of GND-0.3 V to VDD+0.3 V.
22	VC6	input	Positive terminal connection for cell 6, with an absolute range of GND-0.3 V to VDD+0.3 V.
23	VC6	input	Positive terminal connection for cell 6 as printed in the datasheet (duplicate label of pin 22), with an absolute range of GND-0.3 V to VDD+0.3 V.
24	VC7	input	Positive terminal connection for cell 7, with an absolute range of GND-0.3 V to VDD+0.3 V.
25	VC8	input	Positive terminal connection for cell 8, with an absolute range of GND-0.3 V to VDD+0.3 V.
26	VC9	input	Positive terminal connection for cell 9, with an absolute range of GND-0.3 V to VDD+0.3 V.
27	VC10	input	Positive terminal connection for the highest cell (cell 10), with an absolute range of GND-0.3 V to VDD+0.3 V.
28	VDD	power_in	Positive power supply connection pin, with an operating range of 3 V to 80 V and an absolute maximum of 80 V above GND (VDD-GND -0.3 V to 80 V).

Key specifications

Parameter	Value
Manufacturer	TMI
Package	SSOP-28
Category	Power Supply Chip
Pins	28

CAD (KiCad official)

Symbol: TMI4101A
Footprint: Package_SO:SSOP-28_3.9x9.9mm_P0.635mm
3D model: SSOP-28 (KiCad packages3D, STEP)
3D model files: tmi4101a-etched.step / tmi4101a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tmi4101a.step / tmi4101a.glb are the bare package body.

Provenance

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

Datasheet: TMI datasheet (21 pp, sha256 1d6cecb0255c70af, retrieved 2026-10-30, 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, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF

TMI4101A

Verified TMI4101A

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README

TMI4101A

Pinout

Key specifications

CAD (KiCad official)

Provenance