参数资料
型号: AS3691A EB
厂商: ams
文件页数: 2/23页
文件大小: 0K
描述: BOARD EVAL AS3691A
标准包装: 1
电流 - 输出 / 通道: 400mA
输出及类型: 4,非隔离
输出电压: 最高 15V
输入电压: 10 ~ 12 V
已供物品:
已用 IC / 零件: AS3691A

AS3691
Datasheet
Datasheet
AS3691
4 Precision 400mA Current Sources for RGB and Single Color Leds
1 General Description
?
Up to 15V
Automatic Supply Regulation’ to reduce power
15V is sufficient for most applications as the
The AS3691 (AS3691A and AS3691B) features four
high precision current sources for lighting of up to
four LED strings (RGB or single color leds). Each
of the four currents sources can be controlled
independently by PWM inputs. The full scale
current value is set by external resistors.
2 Key Features
4 x up to 0.4A constant current outputs
Programmable with external resistors
4 independent PWM inputs
Absolute current accuracy +/-0.5%
dissipation 1)
Very wide output voltage current source
voltage compliance
? Down to 0.41V
2)
Integrated overtemperature protection
Separate sense pads (Rfb1-Rfb4) for easy and
precise PCB Layout
Package
? DIE
? QFN24 4x4mm
? eP-TSSOP
2)
AS3691 dose not switch off the LED current
completely
1)
Patent Pending
3 Applications
General Lighting
Backlighting
RGB Backlighting for LCD TV/Monitors with
White Color Balancing
4 Application Diagrams
Figure 1 – Application Diagram of AS3691 for Single Color Lighting
VDD
UV
Csup
100nF
Cvdd
100nF
Rvdd
VDD
UV
VREG
UV1
CURR1
UV2
CURR2
UV3
CURR3
UV4
CURR4
AS3691
Vc
Vc
Vc
Vc
D1
Ref
T1
T2
T3
T4
Overtemp
R1
I1
R2
I2
R3
I3
R4
I4
Pad VSS
ON1
RFB1
RES1 ON2
RFB2
RES2 ON3
RFB3
RES3 ON4
RFB4
RES4
VSS
PWM
www.austriamicrosystems.com (ptr)
Ri1
Revision 2.3
Ri2
Ri3
Ri4
VSS
PWM
1 - 22
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