LP3921 datasheet(16/44 Pages) TI2

部件名	LP3921

功能描述	LP3921 Battery Charger Management and Regulator Unit with Integrated Boomer™ Audio Amplifier

PDF	44 Pages

Scroll/Zoom	100%

制造商	TI2 [Texas Instruments]

网页	https://www.ti.com

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16 / 44 page

LDO2 - 7

PS_HOLD

LDO1

If PS_HOLD is low 35 ms after initially going low,

then LDO2-7 are shutdown

LDO1 is shutdown 40 Ps after other

LDO's are shutdown

35 ms

40 Ps

RESET

CHG_IN

HF_PWR

PS_HOLD

LDO1

LDO2

320 ms

87%

87% Reg

PS_HOLD needs to be asserted within 1200 ms

after HF_PWR, or CHG_IN rising edge has been

detected.

If charger is connected (CHG_IN) or HF_PWR is

applied, then both events are filtered for 320 ms

before enabling LDO1

60 ms

1.2s

If no enabling signal is high on

the rising edge of PS_HOLD,

shutdown will occur.

RESET

200 Ps

Either HF_PWR or CHG_IN will enable LDO1

LP3921

SNVS580A – AUGUST 2008 – REVISED MAY 2013

www.ti.com

Figure 4. LP3921 Power On Behavior (Failed PS_Hold)

Figure 5. LP3921 Normal Shutdown Behavior

LP3921 Serial Port Communication

Slave Address Code 7h’7E

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Product Folder Links: LP3921

LP3921 数据表(PDF) 16 Page - Texas Instruments

LP3921 数据表(HTML) 16 Page - Texas Instruments

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