AATIAN107 Datasheet, PDF (2/8 Pages) SiGe Semiconductor, Inc. – S2Cwire Controlled, Serial LED Boost Driver

AHK1421 EVAL :
Board Schematic
J1
DC+
2.7~5.5V
DC-
AHK1421
White LED
Driver
EVALUATION BOARD DATASHEET
EV-184
S²Cwire Controlled, Serial LED Boost Driver
CIN
2.2µF
L1
10µH
U1
6
AHK1421ICA
VIN
LX ¹
OUT ⁵
4 EN/SET
GND
2
FB ³
LX
DS1
J2
D1
D2
D3
D4
D5
D6
RFB
12.5
VOUT
COUT
2.2µF
V_MCU
R4
51k
EN/SET
UP
DOWN
CYCLE
R7 R8 R9
1k 1k 1k
S2Cwire
Microcontroller
U2 PIC12F675
1
2
3
4
VDD
GP5
GP4
GP3
VSS
GP0
GP1
GP2
8
7
6
5
R6
330
LED2
Green
C1 R5
0.1µF 1k
LED1
Red
Figure 2: AHK1421 Evaluation Board Schematic
2
www.analogictech.com
EV-184.2011.05.1.0