AS3691

austriami crosyst ems

Product Brief

www.austriamicrosystems.com

Revision 1.2

2 - 3

Figure 2 – Application Diagram of AS3691 for RGB Lighting (single Module shown)

Figure 3 – Complete AS3691 Application using White LEDs

VSS

VSS

VDDR

VDDR

Ri1

Ri2

Ri3

Ri4

Rvdd

UVR

UVR

UVB

UVB

UVG

UVG

PWMR

PWMR

PWMB

PWMB

PWMG

PWMG

VDDB

VDDB

VDDG

VDDG

Ref

Overtemp

AS3691

T1

T2

T3

T4

D1

R1

R2

R3

R4

VREG

VSS

ON1

ON2

ON3

ON4

CURR1

CURR2

CURR3

CURR4

RES1

RES2

RES3

RES4

I1

UV1

Vc

UV2

UV3

UV4

I2

I3

I4

Vc

Vc

Vc

RFB1

RFB2

RFB3

RFB4

15

22

1

20

17

10

13

8

5

21,Pad

23

2 24

16

19

18

14

11

12

4

7

6

Cvdd

100nF

UV

VDD

Voltage Feedback

input for DCDC

DCDC Converter

for VDD

Overtemp

AS3691

D1

Vc

Vc

Vc

Vc

...

...

...

Main

supply

PWM

VSS

PWM

(optional)

5V powered

system

(optional)

Overtemp

AS3691

D1

...