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PDF RT9379 Data sheet ( Hoja de datos )
| Número de pieza | RT9379 | |
| Descripción | 6 Channels 150mA x1/x1.5/x2 Charge Pump | |
| Fabricantes | Richtek | |
| Logotipo |  |
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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
1 page  
RT9379
Typical Operating Characteristics
Efficiency vs. Input Voltage
100
90
80
70
60
50
40
30
20
10
LED VF = 3.02V
0
2.8 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5
Input Voltage (V)
x1 Mode Quiescent Current vs. Input Voltage
1.30
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
2.8
LED Current vs. Input Voltage
LED1
LED2
LED3
LED4
LED5
LED6
LED VF = 3.02V
3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5
Input Voltage (V)
x2 Mode Quiescent Current vs. Input Voltage
4.5
1.25
4.0
1.20
3.5
1.15
3.0
1.10
1.05 2.5
1.00
2.8 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5
Input Voltage (V)
2.0
2.8 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5
Input Voltage (V)
Shutdown Current vs. Input Voltage
1
0.9
0.8 EN
(5V/Div)
0.7
VOUT
0.6 (1V/Div)
0.5
0.4
C2P
(2V/Div)
0.3
0.2 IIN
0.1 (200mA/Div)
0
2.8 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5
Input Voltage (V)
x1 Mode Inrush Current Response
VIN = 3.2V
Time (100μs/Div)
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS9379-02 January 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet RT9379.PDF ] | |
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