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  Richtek Technology Electronic Components Datasheet  

RT9379 Datasheet

6 Channels 150mA x1/x1.5/x2 Charge Pump

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®
RT9379
6 Channels 150mA x1/x1.5/x2 Charge Pump White LED Driver
General Description
The RT9379 is a 6 channel WLED driver with auto mode
selection of x1, x1.5 and x2 mode with low dropout voltage
in current sources. The RT9379 can power up to 6 white
LEDs with regulated constant current for uniform intensity.
Each channel (LED1 to LED6) can support up to 25mA.
The part maintains highest efficiency by utilizing x1/x1.5/
x2 fractional charge pump and low dropout current
regulators. For the brightness control, user can easily use
a PWM signal generated from GPIO to control the
brightness of WLEDs.
The RT9379 is available in a WQFN-16L 2x3 package.
Small 1μF capacitors can be used for fly capacitors. It
provides the best backlighting solution with high efficiency
and smallest board space for portable application.
Ordering Information
RT9379
Package Type
QW : WQFN-16L 2x3 (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.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Features
z 85% Average Efficiency Over Li-ion Battery
Discharge
z Support Up to 6 White LEDs
z Support Up to 25mA/Per Channel
z PWM Brightness Control
z 60mV Current Source Dropout
z 1% LED Current Accuracy
z 0.7% LED Current Matching
z Automatic x1/x1.5/x2 Charge Pump Mode
Transition
z Low Input Noise and EMI
z Over Voltage Protection
z Power On/Mode Transition Inrush Protection
z 1MHz Switching Frequency
z 0.4uA Low Shutdown Current
z RoHS Compliant and Halogen Free
Applications
z Camera Phone, Smart Phone
z White LED Backlighting
Pin Configurations
(TOP VIEW)
LED4
LED5
LED6
VOUT
PGND
1
2
3
4
5
16 15 14
GND
17
6 78
13 AGND
12 CF
11 VIN
10 EN
9 C2P
WQFN-16L 2x3
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS9379-02 January 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT9379 Datasheet

6 Channels 150mA x1/x1.5/x2 Charge Pump

No Preview Available !

RT9379
Typical Application Circuit
CFLY1
1µF
CFLY2
1µF
8 79 6
C1P C1N C2P C2N
11 VIN
CIN PWM Input
1µF 10 EN
RT9379
LED1 14
LED2 15
LED3 16
4 VOUT
LED4 1
COUT
1µF
12 CF
CCF
0.1µF
AGND
13
LED5 2
LED6 3
PGND
5
Function Block Diagram
C1P C1N C2P C2N
VIN
CF
EN
PGND
AGND
Soft Start
Circuit
UVLO Gate Driver
1MHz
OSC
Mode Decision
OVP
PWM Dimming
Controller
Shutdown Delay
Current
Bias
Current Source
VOUT
LED1
LED2
LED3
LED4
LED5
LED6
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS9379-02 January 2014


Part Number RT9379
Description 6 Channels 150mA x1/x1.5/x2 Charge Pump
Maker Richtek
PDF Download

RT9379 Datasheet PDF






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