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PDF RT9396 Data sheet ( Hoja de datos )
| Número de pieza | RT9396 | |
| Descripción | I2C Interface PMIC | |
| Fabricantes | Richtek | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT9396 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
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RT9396
I2C Interface PMIC with 6-Channel WLED Driver and 4-LDO
General Description
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-Channel 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.
Ordering Information
RT9396
Package Type
QW : WQFN-24L 3x3 (COL) (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Features
z Tri-Mode (x1/x1.5/x2) Charge Pump
z Maximum 25mA x 6-Channel LED Backlighting
Output Current
z Support Main/Sub (4+2/5+1) LED Function
z 64 Steps Programmable LED Current
z Support PWM Dimming Function
z Fade In/Out Via I2C Control
z 4 Low Dropout Regulators
z Maximum 200mA x 4-Channel LDO Output Current
z 16-Level LDO Output Voltage Setting
z I2C Programmable Independent LDO Channel
ON/OFF Control
z Over Temperature Protection
z Thin 24-Lead WQFN Package
z RoHS Compliant and Halogen Free
Applications
z Cellular Phones
z PDAs and Smart Phones
Pin Configurations
(TOP VIEW)
PGND
C2N
C1N
C1P
C2P
24 23 22 21 20 19 18
1 17
2 16
3 15
4 14
5 13
SCL
SDA
EN
PWM
CF
6 7 8 9 10 11 12
WQFN-24L 3x3 (COL)
DS9396-01 April 2011
www.richtek.com
1
1 page  
Function Block Diagram
RT9396
VIN
CF
PWM
SDA
SCL
EN
AGND
PGND
x1/x1.5/x2
Charge Pump
1MHz
Oscillator
Mode
Decision
Gate Driver
OVP
Soft Start
PWM
Dimming
Shutdown
Delay
LED
Ctrl.
I2C
Current Setting
OR
Gate
LDO
Ctrl.
Current Source
OTP &
Current Bias
VOUT
POR
BandGap
Reference
-
+
LDOIN
VOUT
LED1
LED2
LED3
LED4
LED5
LED6
LDOIN
LDO1 to
LDO4
RES Divider
Voltage Setting
x4
Table 1. 16-Step LDO Output Voltage Setting
LDO1 & LDO3 & LDO4
C3 C2 C1 C0 LDO2 Output Output
Voltage (V) Voltage (V)
LDO1 & LDO3 & LDO4
C3 C2 C1 C0 LDO2 Output Output
Voltage (V) Voltage (V)
000 0
1
1.1
100 0
2.5
2.2
000 1
1.1
1.2
100 1
2.6
2.3
001 0
1.2
1.4
101 0
2.7
2.4
001 1
1.3
1.7
101 1
2.8
2.5
010 0
1.5
1.8
110 0
2.9
2.8
010 1
1.6
1.9
110 1
3
2.85
011 0
1.8
2
111 0
3.1
3.2
011 1
2.1
2.1
111 1
3.3
3.3
DS9396-01 April 2011
www.richtek.com
5
5 Page 
For LDO
Output Voltage vs. Temperature
3.34
3.33
3.32
3.31
3.30
3.29
3.28
-50
-25
LDO2
LDO3
LDO1
LDO4
VIN = 4.3V, VLDO = 3.3V
0 25 50 75
Temperature (°C)
100 125
RT9396
Dropout Voltage vs. Load Current
250
200
150
100
LDO1
LDO3
LDO4
50 LDO2
0
0 50 100 150 200 250
Load Current (mA)
Power On
Power On
SCL
(5V/Div)
VLDO1
(2V/Div)
VLDO2
(2V/Div)
IIN
(500mA/Div)
VIN = 4.3V, VLDO1 = VLDO2 = 3.3V, ILOAD = 200mA
Time (25μs/Div)
SCL
(5V/Div)
VLDO3
(2V/Div)
VLDO4
(2V/Div)
IIN
(500mA/Div)
VIN = 4.3V, VLDO3 = VLDO4 = 3.3V, ILOAD = 200mA
Time (25μs/Div)
VIN 4.8
(V)
3.8
VLDO2
(20mV/Div)
VLDO1
(20mV/Div)
Line Transient Response
VIN = 3.8V to 4.8V
VLDO1 = VLDO2 = 2.8V, ILOAD = 200mA
Time (100μs/Div)
VIN 4.8
(V)
3.8
VLDO4
(20mV/Div)
VLDO3
(20mV/Div)
Line Transient Response
VIN = 3.8V to 4.8V
VLDO3 = VLDO4 = 2.8V, ILOAD = 200mA
Time (100μs/Div)
DS9396-01 April 2011
www.richtek.com
11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet RT9396.PDF ] | |
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