RT8206L Просмотр технического описания (PDF) - Richtek Technology

Номер в каталоге

Компоненты Описание

Список матч

RT8206L

High Efficiency, Main Power Supply Controller for Notebook Computers

Richtek Technology 

RT8206L/M

PHASE1 (Pin 16)

Inductor Connection for SMPS1. PHASE1 is the internal

lower supply rail for the UGATE1 high side gate driver.

PHASE1 is the current-sense input for the SMPS1.

BOOT1 (Pin 17)

Boost Flying Capacitor Connection for SMPS1. Connect

to an external capacitor according to the typical application

circuits.

LGATE1 (Pin 18)

SMPS1 Synchronous-Rectifier Gate-drive Output. LGATE1

swings between PGND and PVCC.

PVCC (Pin 19)

Supply Voltage for Low Side MOSFET driver LGATEx.

Connect a 5V power source to the PVCC pin (bypass

with 1μF MLCC capacitor to PGND if necessary). There is

an internal 10Ω connecting from PVCC to VCC. Make

sure that both VCC and PVCC are bypassed with 1μF

MLCC capacitors.

SECFB (Pin 20) (RT8206L)

Charge Pump Feedback Input. The SECFB is used to

monitor the optional external charge pump. Connect a

resistive voltage-divider from the charge pump output to

GND to detect the output. If SECFB drops below the

threshold voltage, an ultrasonic pulse occurs to refresh

the external charge pump driven by LGATE1 or LGATE2

NC (Pin 20) (RT8206M)

No Internal Connection.

GND [Pin 21, 33 (Exposed Pad)]

Analog Ground for both SMPS and LDO. The exposed

pad must be soldered to a large PCB and connected to

GND for maximum power dissipation.

PGND (Pin 22)

Power Ground for SMPS Controller. Connect PGND

externally to the underside of the exposed pad.

LGATE2 (Pin 23)

SMPS2 Synchronous-Rectifier Gate-drive Output. LGATE2

swings between PGND and PVCC.

BOOT2 (Pin 24)

Boost Flying Capacitor Connection for SMPS2. Connect

this pin to an external capacitor according to the typical

application circuits.

PHASE2 (Pin 25)

Inductor Connection for SMPS2. PHASE2 is the internal

lower supply rail for the UGATE2 high side gate driver.

PHASE2 is the current sense input for the SMPS2.

UGATE2 (Pin 26)

High Side MOSFET Floating Gate-Driver Output for

SMPS2. UGATE2 swings between PHASE2 and BOOT2.

EN2 (Pin 27)

SMPS2 Enable Input. The SMPS2 will be enabled if EN2

is greater than the logic high level and be disabled if EN2

is less than the logic low level. If EN2 is connected to

REF, the SMPS2 starts after the SMPS1 reaches

regulation (delay start). Drive EN2 below 0.8V to clear

fault level and reset the fault latches.

PGOOD2 (Pin 28)

SMPS2 Power Good Open-Drain Output. PGOOD2 is low

when the SMPS2 output voltage is more than 10% below

the normal regulation point or during soft-start. PGOOD2

is high impedance when the output is in regulation and

the soft-start circuit has terminated. PGOOD2 is low in

shutdown.

SKIP (Pin 29)

SMPS Operation Mode Control.

SKIP = GND : DEM Mode operation

SKIP = REF : Ultrasonic Mode operation

SKIP = VCC : PWM Mode operation.

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

DS8206L/M-07 June 2012

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

7

Share Link: