RT9526GE 데이터 시트보기 (PDF) - Richtek Technology

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RT9526GE

Linear Single Cell Li-Ion Battery Charger with Input Over Voltage Protection

Richtek Technology 

RT9526

Flow Chart

Standby State

P-MOSFET = OFF

YES

NO VIN < UVLO &

VIN < OVP &

ENB = L

Power Off State

P-MOSFET = OFF

VIN - VBATT > VOS YES

BATT > 2.8V

YES

Soft-Start

NO

Sleep State

P-MOSFET = OFF

NO

Pre_Charge

ICHG_PRE = (1/6) x

ICHG_FAST, HG_SB = L

Fast-Charge

ICHG_FAST = 150mA

RSET = 29.4k

CHG_SB = L

CV State

VBATT = 4.2V

ICHG = 0A CHG_SB

=H

YES

NO

VBATT ≥8 4.2V

Any State or

VIN > OVP or

VIN > UVLO or

ENB = H

Figure 1. Operation State Diagram for Charger function

VIN > UVLO

& VIN < OVP &

VIN-VBATT > VOS

YES

NO

Figure 2. PGB State

PGB = L

PGB = H

NO

ENB = L

YES

ICHG < IIMIN &

VBATT > 2.8V

YES

NO

CHG _SB = H

CHG_SB = H

CHG_SB = L

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Figure 3. CHG_SB State

NO

ICHG < ICHG_FAST

& VBATT < 2.8V

YES

DS9526-01 April 2011

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