Table of Contents
Advertisement
VCAM_IO_1V8
VCAM_DIG_1V8
VCAM_ANA_2V8
R604
0
R603
DNI
C610
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. The RT9396 also comprises low noise, low dropout
regulators, which provide up to 200mA of current for each of the four channels. The four LDOs deliver 3%
output accuracy and low dropout voltage of 200mV @ 200mA.
Users can easily configure LDO output voltage via the I2C interface control. The LDOs also provide current
limiting and over-temperature functions. The RT9396 is available in a WQFN-24L 3x3 package.
LGE Internal Use Only
VBAT
FM_LNA_EN
C605
2.2u
FM_LNA_EN
C608
C609
C611
1u
1u
2.2u
Figure 3-9-2. RT9396 CIRCUIT DIAGRAM
C601
C602
1u
1u
6
24
AGND
VOUT
7
23
VIN
LED1
8
22
LDOIN
LED2
U601
9
21
RT9396
LDO4
LED3
10
20
LDO3
LED4
11
19
LDO2
LED5
12
18
LDO1
LED6
- 47 -
Copyright © 011 LG Electronics. Inc. All right reserved.
3. TECHNICAL BRIEF
C604
1u
LCD_LED_CA1
LCD_LED_CA2
LCD_LED_CA3
LCD_LED_CA4
LCD_LED_CA5
I2C_SCL
I2C_SDA
LCD_BL_CTRL
LCD_PWM
R606
100K
Only for training and service purposes
Advertisement
Table of Contents
