LP5526_15 Datasheet, PDF (6/41 Pages) Texas Instruments – Lighting Management Unit With High-Voltage Boost Converter With up to 150-mA Serial Flash LED Driver

LP5526
SNVS431D – FEBRUARY 2006 – REVISED MARCH 2013
BLOCK DIAGRAM
L1
C_IN C_VDD
10 PH
Li-Ion
Battery
or
Charger
10 éF 100 nF VDD2
VDD1
1 PF
VDDA
C_VDDA
VREF
C_{VREF 100 nF}
Logic supply
LDO
REF
POR
THSD
R_RGB
IRGB
IRT
R_RT 82k:
BIAS
OSC
Optional EMI FILTER,
close to SW pin
R_SW ^CSW
390: 100 pF
SW
D1
PWM
BOOST
8-Bit
IDAC
D
A
V_DDIO
R_SDA
MCU
SDA
SCL
NRST
VDDIO
C_VDDIO
100 nF
GPIO[2]
GPIO[1]
GPIO[0]/PWM
CONTROL
8-Bit
IDAC
D
A
I²C
BRIGHTNESS
CONTROL
www.ti.com
FB
BG
I_MAX = 150 mA
V_OUT = 8V...20 V
C_OUT
2 x 4.7 éF
GND_SW _MAIN
BACKLIGHT
0...25 mA/LED
MAIN
GND_WLED
SUB
BACKLIGHT
0...25 mA/LED
SUB
RLED
GLED
BLED
FLASH
0...150mA
GND
GND_RGB
6
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