Datasheet > RT8239CGQW

RT8239CGQW

更新时间： 2022-05-14 22:20:20

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
24页	385K
描述
High Efficiency, Main Power Supply Controller for Notebook Computers

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RT8239CGQW 数据手册

RT8239A/B/C

Table1. Operation Mode Truth Table

Mode

Condition

Comment

Transitions to discharge mode after VIN POR and

after REF becomes valid. LDO5 and LDO3 remain

active.

Power Up

LDOx < UVLO threshold

ENLDO = high, V_OUT1or V_OUT2are

enabled

Run

Normal Operation.

LGATEx is forced high. LDO3 and LDO5 are active.

Either output > 112% of the nominal level. Exit by VIN POR or by toggling ENLDO, ENTRIPx,

and ENM.

Over Voltage

Protection

Both UGATEx and LGATEx are forced low and

Either output < 58% of the nominal level

enter discharge mode. LDO3 and LDO5 are active.

after 3ms time-out expires and output is

Exit by VIN POR or by toggling ENLDO, ENTRIPx,

enabled

Under Voltage

Protection

and ENM.

During discharge mode, there is one path to

Either output is still high in standby mode

discharge the output capacitors’ residual charge to

or shutdown mode

Discharge

GND via an internal switch.

ENTRIPx or ENM < startup threshold,

LDO3 and LDO5 are active.

ENLDO = high.

Standby

Shutdown

ENLDO = low

All circuitry are off.

Thermal

Shutdown

All circuitry are off. Exit by VIN POR or by toggling

ENLDO, ENTRIPx, and ENM.

T_J> 150°C

Table 2. Power up Sequencing (RT8239A)

ENTRIP1

ENTRIP2

(V)

ENLDO (V)

ENM (V)

Low

LDO5

Off

LDO3

Off

SMPS1

Off

SMPS2

Off

(V)

Low

“>1.6V”

=> High

Low

Off

“>1.6V”

=> High

“>2.3V”

=> High

Off

“>1.6V”

=> High

“>2.3V”

=> High

“>1.6V”

=> High

“>2.3V”

=> High

“>1.6V”

=> High

“>2.3V”

=> High

is a registered trademark of Richtek Technology Corporation.

DS8239A/B/C-06 October 2012

www.richtek.com

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