BQ24070 datasheet(16/26 Pages) TI

Part #	BQ24070

Description	SINGLE-CHIP CHARGE AND SYSTEM POWER-PATH MANAGEMENT IC

PDF	26 Pages

Scroll/Zoom	100%

Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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16 / 26 page

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VBAT

VOUT

VAC

IUSB

Battery Temperature Monitoring

bq24070

SLUS694A – MARCH 2006 – REVISED MARCH 2006

FUNCTIONAL DESCRIPTIONS (continued)

Figure 7. Insert Battery – Power-Up Output via BAT

Figure 8 illustrates USB boot up and power-up via USB; channel 1 (CH1) V(USH) = 0 to 5 V; channel 2 (CH2)

USB input current (0.2 A/div); Mode = Low; CE = High; ISET2 = High; VBAT = 3.85 V; V(DPPM) = 3.0 V (V(DPPM) ×

1.15 < VBAT, otherwise DPPM mode increases time duration). When a USB source is applied (if AC is not

present), the CE pin and ISET2 pin are ignored during the boot-up time and a maximum input current of 100 mA

is made available to the OUT or BAT pins. After the boot-up time, the IC implements the CE and ISET2 pins as

programmed.

Figure 8. USB Boot-Up Power-Up

The bq24070 continuously monitors battery temperature by measuring the voltage between the TS and VSS

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BQ24070 Datasheet(PDF) 16 Page - Texas Instruments