BQ24703PWR from Texas Instruments, in a TSSOP-24. 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	ACDET	input	AC or adapter power detection input; when its voltage is below VACPRES the device enters sleep mode with PWM control disabled.
2	ACPRES	output	Open-drain AC power indicator output that is high when the ACDET voltage is greater than VACPRES.
3	ACSEL	input	AC adapter power select input; a logic high selects ac power and a logic low selects the battery.
4	BATDEP	input	Depleted battery level input; battery depletion is detected when BATDEP is less than VACPRES.
5	SRSET	input	Battery charge current programming voltage input that sets the battery charge current limit.
6	ACSET	input	Adapter current programming voltage input that sets the system current level at which dynamic power management occurs.
7	VREF	power_in	Bypassed precision 5-V voltage reference output with a tight tolerance suitable for charging lithium-ion batteries.
8	ENABLE	input	Charge enable input; a high allows PWM control operation to enable charging while a low forces the PWM output high.
9	BATSET	input	External override to the internal precision reference; when used it must be greater than 1.0 V, and grounding it selects the internal reference.
10	COMP	output	Inverting input to the PWM comparator and output of the gm amplifiers, with a type II compensation network to GND recommended.
11	ACN	input	Negative differential input for the ac-to-dc adapter current sense resistor.
12	ACP	input	Positive differential input for the ac-to-dc adapter current sense resistor.
13	BATP	input	Battery charge regulation voltage measurement input to the battery-voltage gm amplifier, regulated to the VFB reference.
14	IBAT	output	Battery current differential amplifier output producing a voltage proportional to battery charge current, suitable for an ADC input.
15	SRN	input	Negative differential battery current sense amplifier input, tied to the battery terminal.
16	SRP	bidirectional	Positive differential battery current sense amplifier input that serves as the source pin for zero volt operation.
17	GND	power_in	Supply return and ground reference.
18	VS	power_in	System (load) voltage input that disables the BATDRV P-channel MOSFET if VS exceeds BATP; grounding VS disables this function.
19	ALARM	output	Open-drain depleted battery alarm output that goes high when the BATDEP voltage is below VACPRES.
20	VHSP	output	Voltage source for driving the gates of the external MOSFETs, bypassed with a 1-µF capacitor close to the pin.
21	PWM	output	Gate drive output for the external P-channel PWM MOSFET, active when ACPRES, ACSEL and ENABLE are high.
22	VCC	power_in	Operational supply voltage.
23	BATDRV	output	Battery power source select output driving an external P-channel MOSFET, driven low to GND when ACDET is less than VACPRES.
24	ACDRV	output	AC or adapter power source select output driving an external P-channel MOSFET, driven low to VHSP when ACSEL is high and ACDET is greater than VACPRES.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	TSSOP-24
Category	Power Management (PMIC)
Pins	24

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Supply voltage analog and PWM operation	VCC	7		28	V	Analog and PWM operation	4
Supply voltage selector operation	VCC	4.5		28	V	Selector operation	4
Negative ac current sense	ACN	7		28	V		4
Positive ac current sense	ACP	7		28	V		4
Negative battery current sense	SRN	5		28	V		4
Positive battery current sense	SRP	5		28	V		4
AC or adapter power detection	ACDET	0		5	V		4
AC power indicator	ACPRES	0		5	V		4
AC adapter power select	ACSEL	0		5	V		4
Depleted battery level	BATDEP	0		5	V		4
Battery charge current programming voltage	SRSET	0		2.5	V		4
Charge enable	ENABLE	0		5	V		4
External override to internal 0.5% precision reference	BATSET	0		2.5	V		4
Inverting input to the PWM comparator	COMP	0		5	V		4
Battery charge regulation voltage measurement input	BATP	0		5	V		4
Battery current differential amplifier output	IBAT	0		5	V		4
System load voltage input pin	VS	0		2.5	V		4
Depleted battery alarm output	ALARM	0		5	V		4
Battery power source select output	BATDRV	0		28	V		4
ACSET	ACSET	0		2.5	V		4
Operating free-air temperature	TA	-40		85	°C		4
Supply voltage range	VCC	-0.3		30	V		3
Battery voltage range SRP, SRN	SRP,SRN	-0.3		30	V		3
Input voltage ACN, ACP	ACN,ACP	-0.3		30	V		3
Virtual junction temperature range	TJ	-40		125	°C		3
Maximum source/sink current VHSP	VHSP			50	mA		3
Maximum ramp rate for VCC	VCC			10	V/μs		3
Maximum sink current ACPRES, COMP, ALARM				2.5	mA		3
Maximum ramp rate for V(BAT)	V(BAT)			10	V/μs		3
Maximum source/sink current BATDRV	BATDRV			10	mA		3
Maximum source/sink current ACDRV	ACDRV			10	mA		3
Maximum source/sink current PWM	PWM			50	mA		3
Maximum source/sink current pulsed ACDRV	ACDRV			50	mA	10-μs rise time, 10-μs fall time, 1-ms pulse width, single pulse	3
Maximum source current VREF	VREF			30	mA		3
Maximum source current SRP	SRP			100	mA		3
Maximum difference voltage SRP-SRN	SRP-SRN			30	V		3
Storage temperature range	Tstg	-65		150	°C		3
Total chip operating current	IDD(OP)	1	1.6	6	mA	ACPRES = High, EN = 0	5
Total battery sleep current, ac not present	IDD(SLEEP)		22	28	μA	ACPRES = Low	5
Oscillator frequency 0°C to 85°C	fOSC(PWM)	280	300	340	kHz	0°C ≤ TJ ≤ 85°C	5
Oscillator frequency -40°C to 125°C	fOSC(PWM)	240	300	350	kHz	-40°C ≤ TJ ≤ 125°C	5
Error-amplifier precision reference voltage TJ=25°C	V(FB)	1.19	1.196	1.202	V	TJ = 25°C	7
Error-amplifier precision reference voltage -40°C to 125°C	V(FB)	1.178	1.196	1.204	V	TJ = -40°C to 125°C	7
Output voltage VREF TJ=25°C	Vref	4.985	5	5.013	V	TJ = 25°C	8
Output voltage VREF -40°C to 125°C	Vref	4.926	5	5.03	V	TJ = -40°C to 125°C	8
Battery current set gain	AV	24	25	26	V/V	0.65 V ≤ SRSET ≤ 2.5 V, 8 V ≤ SRN ≤ 16 V	6
AC current set gain	AV	24.5	25.3	26.5	V/V	0.65 V ≤ ACSET ≤ 2.5 V, 12 V ≤ ACP ≤ 20 V	7
Total battery current-sense full-scale accuracy TJ=25°C		-3		3	%	SRSET = 2.5 V, TJ = 25°C	6
Total ac current-sense full-scale accuracy TJ=25°C		-3.5		3.5	%	ACSET = 2.5 V, TJ = 25°C	7
Sink current COMP (battery current amplifier)	I(SINK)	0.5	1.5	2.5	mA	COMP = 1 V, (SRP-SRN) = 10 mV	6
Input bias current SRP	IIB	70	85	110	μA	V(SRP) = 16 V, (SRP-SRN) = 100 mV, SRSET = 2.5 V, VCC = 28 V	6
Input bias current ACP, ACN	IIB	40	50	65	μA	ACP = ACN = 28 V, VCC = 28 V, ACSET = 2.5 V	7
Low-level input voltage ACSEL, ENABLE	VIL			0.6	V		5
High-level input voltage ACSEL, ENABLE	VIH	1.8			V		5
AC presence detect voltage	V(ACPRES)	1.194	1.246	1.286	V		9
Battery depletion ALARM trip voltage	V(BATDEP)	1.194	1.246	1.286	V		9
Zero volt operation threshold BATDEP increasing		0.743	0.794	0.84	V		9
Zero volt operation threshold BATDEP decreasing		0.57	0.62	0.656	V		9
Battery current output source current IBAT	IS(O)	5	7.1	9.4	mA	(SRP-SRN) = 100 mV	8
Internal reference override input threshold voltage	VIT	0.2	0.25	0.35	V		6
Internal clamp source current COMP	IS(COMP)	70	110	140	μA	Error amplifier = OFF, V(COMP) = 1 V	5

CAD (KiCad official)

Symbol: BQ24703PWR
Footprint: Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm
3D model: TSSOP-24 (KiCad packages3D, STEP)
3D model files: bq24703pwr-etched.step / bq24703pwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bq24703pwr.step / bq24703pwr.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (40 pp, sha256 c7cccca725cc39ed, retrieved 2026-11-06, tier: manufacturer)
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).

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BQ24703PWR

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3D Model

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