Lge Internal Use Only - LG -S367 Service Manual

C318 C319 C320
1u 1u 1u
The RT9396 is a power management IC (PMIC) for backlighting and phone camera applications.
The PMIC contains a 6-Channel charge pump white LED driver and four low dropout linear regulators.
The charge pump drives up to 6 white LEDs with regulated constant current for uniform intensity.
Each channel (LED1 to LED6) supports up to 25mA of current.
These 6-Channels can be also programmed as 4 plus 2-Channels or 5 plus 1-Channels with different current
setting for auxiliary LED application. The RT9396 maintains highest efficiency by utilizing a x1/ x1.5/ x2
fractional charge pump and low dropout current regulators.
An internal 6-bit DAC is used for backlight brightness control. Users can easily configure up to 64-steps of
LED current via the I2C interface control.

LGE Internal Use Only

C312 1u
C313 1u
VBAT
6
AGND
7
VIN
8
U301
LDOIN
9
LDO4
10
LDO3
11
LDO2
12
LDO1
C321 C322
1u 2.2u
C323
0.1u
Figure 3-9-2. RT9396 CIRCUIT DIAGRAM
24
VOUT
23
MLED1
LED1
22
MLED2
LED2
21
MLED3
LED3
20
MLED4
LED4
19
MLED5
LED5
18
LED6
C315
1u
I2C_SCL
I2C_SDA
LCD_BL_CTRL
LED_PWM
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3. TECHNICAL BRIEF
VBAT
R309
R310 C314
15
15 1u
LD300 LD301
Only for training and service purposes