RT5021 datasheet(6/67 Pages) RICHTEK

6 / 67 page

RT5021

DS5021-01 April 2013

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Function Block Diagram

CH2 LV C-Mode

Sync.

Step-Up/Down

For 1A

VREF + DVS

VO2

LX2A

PVD2

SYS

WAKE

VRTC

Battery

Charger Type

Detector

VIN

Output Voltage of

CH1 to CH6, CH8

CH7 Dimming

Ratio and OVP

Threshold Enable

of CH5, CH6,

CH7, CH8

PDM/PWM setting

of CH1, CH2,

CH3, CH4

Charger Type

Setting/Status

GND

VDDI

VP Buffer with

NTC Type Detector

3.3V

SYS

CHG_TYP [2 : 0]

CHG_1DET

CHG_2DET

CHGRUN

TS Comparators

SYS

BAT

Li+ Battery

Linear Charge

with APPM

CH9 RTC LDO

with Body Diode

Control

SYS

PVD1

VDDI

Power Plug-In

Wake up Detector

POR

BAT

VIN

Enable Control

POR

Sequence Detection

& Control

SEQ

SYS

2C Control Interface

(Fast Mode up to 400kb/s)

SCL

SDA

Interrupt

Handler

SYS

THR

ECO

PGOOD

SAFE

TS_METER [2 :0 ]

No_BAT

DPM

CHGRUN

INT

CH6 Low

VIN LDO

SYS

VREF + DAC

PVD6

VO6

CH8 Low

VIN LDO

SYS

VREF + DAC

PVD8

VO8

LX7

PVD7

SYS

FB7

VREF + DAC

CH7 HV C-Mode

Sync. Step-Up +

Current Source +

Mode Selector

for 1 to 6WLED

Body

Diode

Control

SYS

LX1

CH1 C-Mode

Step-Up

for 1A

PVD1

SYS

VREF + DVS

Body

Diode

Control

SYS

PVD1

LX2B

FB2

CH3 C-Mode

Step-Down

for 1.3A

VREF + DVS

LX3

PVD3

SYS

FB3

CH4 C-Mode

Step-Down

for 1.3A

VREF + DVS

LX4

PVD45

SYS

FB4

CH5

C-Mode

Step-Down

for 0.6A

VREF + DVS

LX5

PVD45

SYS

VO5/FB5

CHG2

CHG

SYS

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