BQ24702PW

Maximum Operating Temperature : + 85 C
Battery Type : Li-Ion
Minimum Operating Temperature : - 40 C
Packaging : Tube
Output Current : 2000 mA
Package / Case : TSSOP-24
Output Voltage : 2.5 V (Max)
Operating Supply Voltage : 4.5 V to 28 V


Description

The BQ24702PW belongs to bq24702/bq24703 family which is a highly integrated battery charge controller and selector tailored for notebook and sub-notebook PC applications and which uses dynamic power management (DPM) to minimize battery charge time by maximizing use of available wall-adapter power. The bq24702/bq24703 uses a fixed frequency, pulse width modulator (PWM) to accurately control battery charge current and voltage. The selector function allows the manual selection of the system power source, battery or wall-adapter power. The bq24702/bq24703 supports battery-conditioning and battery-learn cycles through the ACSEL function. The ACSEL function allows manual selection of the battery or wall power as the main system power. It also provides autonomous switching to the remaining source (battery or ac power) should the selected system power source terminate (refer to Table 1 for the differences between the bq24702 and the bq24703). The bq24702/bq24703 also provides an alarm function to indicate a depleted battery condition. Charge current limits can be programmed from a keyboard controller DAC or by external resistor dividers from the precision 5-V, ±0.6%, externally bypassed voltage reference (VREF), supplied by the bq24702/bq24703. This is achieved by dynamically adjusting the battery charge current based on the total system (adapter) current.

The features of BQ24702PW can be summarized as (1)dynamic power management, DPM minimizes battery charge time; (2)integrated selector supports battery conditioning and smart battery learn cycle; (3)zero volt operation; (4)selector feedback circuit ensures break-before-make transition; (5)±0.4% charge voltage accuracy, suitable for charging li-ion cells; (6)±4% charge current accuracy; (7)300-kHz integrated PWM controller for high-efficiency buck regulation; (8)depleted battery detection and indication to protect battery from over discharge; (9)20-A sleep mode current for low battery drain; (10)24-Pin TSSOP Package and 5 mm * 5 mm QFN package (bq24703 only).

The absolute maximum ratings of BQ24702PW are (1)supply voltage range: VCC: -0.3 V to 30 V; (2)battery voltage range: SRP, SRN: -0.3 V to 30 V; (3)input voltage: ACN, ACP: -0.3 V to 30 V; (4)virtual junction temperature range, TJ: -40°C to 125°C; (5)maximum source/sink current VHSP: 50 mA; (6)maximum ramp rate for VCC: 10 V/ s; (7)maximum sink current ACPRES, COMP, ALARM: 2.5 mA; (8)maximum ramp rate for V(BAT): 10 V/ s; (9)maximum source/sink current BATDRV: 10 mA; (10)maximum source/sink current ACDRV: 10 mA; (11)maximum source/sink current PWM: 50 mA; (12)maximum source/sink current pulsed ACDRV, (10-s rise time, 10-s fall time, 1-ms pulse width, single pulse): 50 mA; (13)maximum source current VREF: 30 mA; (14)maximum source current SRP: 100 mA; (15)maximum difference voltage SRP - SRN: 30 V; (16)storage temperature range Tstg: -65°C to 150°C; (16)lead temperature (soldering, 10 seconds): 300°C.

Parameters:

Technical/Catalog Information	BQ24702PW
Vendor	Texas Instruments
Category	Integrated Circuits (ICs)
Battery Type	Multi-Chemistry
Function	Charge Management
Package / Case	24-TSSOP
Packaging	Tube
Operating Temperature	-40°C ~ 85°C
Voltage - Supply	4.5 V ~ 28 V
Drawing Number	296; 4040064; PW; 8, 14, 16, 20, 24, 28
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	BQ24702PW BQ24702PW 296 15264 5 ND 296152645ND 296-15264-5