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PDF RT9365 Data sheet ( Hoja de datos )
| Número de pieza | RT9365 | |
| Descripción | 100mA 5-Channel Charge Pump White LED Driver | |
| Fabricantes | Richtek Technology | |
| Logotipo |  |
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Preliminary
RT9365
100mA 5-Channel Charge Pump White LED Driver
with Low Dropout Current Source
General Description
The RT9365 is a high performance white LED driver. It
integrates current sources and automatic mode selection
charge pump. The part maintains the high efficiency by
utilizing an x1/x1.5 fractional charge pump and low dropout
current sources. The small equivalent x1 mode open loop
resistance and ultra-low dropout voltage of current source
extend the operating time of x1 mode and optimize the
efficiency of Li-ion battery in white LED applications.
The RT9365 supports up to 5 white LEDs and regulates a
constant current for uniform intensity. The part implements
a 4-bit DAC for brightness control. Users can easily
configure the LED current from 1.25mA to 20mA by a serial
pulse. The dimming of white LEDs current can be achieved
by applying a pulse signal to the EN pin. There are totally
16 steps of current could be set by users. The operating
voltage range is 2.8V to 5.0V. Internal soft start circuitry
effectively reduces the in-rush current while both start-up
and mode transition. The load is disconnected from VIN
while shutdown and the shutdown current is less than
1μA.
RT9365 is available in a WQFN 3x3-16L package.
Ordering Information
RT9365
Package Type
QW : WQFN-16L 3x3 (W-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Note :
RichTek Pb-free and Green 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.
`100% matte tin (Sn) plating.
Features
z 85% Average Efficiency Over Battery Life
z Support up to 5 White LEDs
z 80mV Typical Current Source Dropout
z Support up to 100mA Output Current
z 1% Typical LED Current Accuracy
z 0.7% Typical LED Current Matching
z Soft Start Function
z Auto Charge Pump Mode Selection
z 250kHz Fixed Frequency Oscillator
z Output Over Voltage Protection
z 16-Step Brightness Control
z Low Input Noise and EMI
z Low 0.3μA Shutdown Current
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Mobile Phone, DSC, MP3
z White LED Backlighting
z LCDDisplay Supply
Pin Configurations
(TOP VIEW)
16 15 14 13
C1N
C2N
C2P
C1P
1
2
3
4
GND
12 LED2
11 LED3
10 LED4
9 LED5
5678
WQFN-16L 3x3
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
DS9365-00 August 2006
www.richtek.com
1
1 page  
Preliminary
RT9365
Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for
stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may remain possibility to affect device reliability.
Note 2. Devices are ESD sensitive. Handling precaution is highly recommended.
Note 3. The device is not guaranteed to function outside its operating conditions.
Note 4. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard.
DS9365-00 August 2006
www.richtek.com
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet RT9365.PDF ] | |
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