AS3687 datasheet(4/55 Pages) AMSCO

4 / 55 page

AS3687/87XM

Datasheet

www.austriamicrosystems.com/AS3687

1v3-4

3 - 54

Figure

2 – Application Diagram of the AS3687XM

Step Up DC/DC

Converter

DCDC_SNS

DCDC_GATE

DCDC_FB

Charge Pump

1:1, 1:1.5, 1:2

150mA

Battery

VBAT

C2_P

1µF

500nF

C2_N

C1_P

500nF

C1_N

CPOUT

1.0µF

CURR30

CURR31

CURR32

Current Sinks

each 0.15-38.25mA

CURR1

CURR2

HV Current Sinks

each 0.15-38.25mA

Serial

Interface

1-10k

Ω

VDD_I/F

CLK

DATA

References

and

Temperature

Supervision

1µF

V2_5

DATA

AS3687XM

Lighting

Management

Unit

8Bit PWM

Generator

Automatic Dimming

and LED Pattern

Generator

VSS

LED

Test

VBAT

Zero Power

Device

Wakeup

ADC

vtemp

currx

dcdc

CURR6

Audio Processing

CURR33/AUDIO_IN

Audio IN

DRGB1

DRGB2

Alternative:

nd Audio or Backlight

Alternative:

use DCDC step up

for CURR1,2,6

4.7µF

1.5nF

DCDC_FB

Ω

15nF

1µF

0.1

Ω

10µH

C10

100nF

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