LED Driver. RP1366 Datasheet

RP1366 Driver. Datasheet pdf. Equivalent

RP1366 Datasheet
Recommendation RP1366 Datasheet
Part RP1366
Description 120mA 6-Channel Charge Pump White LED Driver
Feature RP1366; Preliminary RP1366 120mA 6-Channel Charge Pump White LED Driver with Low Dropout Current Source G.
Manufacture RICHPOWER
Datasheet
Download RP1366 Datasheet




RICHPOWER RP1366
Preliminary
RP1366
120mA 6-Channel Charge Pump White LED Driver with Low
Dropout Current Source
General Description
Features
The RP1366 is a high performance white LED driver. It
integrates a 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 RP1366 supports up to 6 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 5V. 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
1uA.
85% Average Efficiency Over Battery Life
Support up to 6 White LEDs
80mV Typical Current Source Dropout
Support up to 120mA Output Current
1% Typical LED Current Accuracy
0.7% Typical LED Current Matching
Soft Start Function
Auto Charge Pump Mode Selection
1MHz Fixed Frequency Oscillator
Output Over Voltage Protection
16-Step Brightness Control
Low Input Noise and EMI
Low 0.3uA Shutdown Current
RoHS Compliant and Halogen Free
Applications
Mobile Phone, DSC, MP3
White LED Backlighting
LCD Display Supply
Pin Configurations
The RP1366 is available in a WQFN 3x3-16L package.
Ordering Information
RP1366
Package Type
QW : WQFN-16L 3x3 (W-Type)
Operating Temperature Range
G : Green (Halogen Free with Commer-
cial Standard)
Note :
Richpower 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.
(TOP VIEW)
16 15 14 13
C1N 1
C2N 2
C2P 3
C1P 4
GND
17
12 LED3
11 LED4
10 LED5
9 LED6
5678
WQFN-16L 3x3
Marking Information
For marking information, contact our sales representative
directly or through a Richpower distributor located in your
area, otherwise visit our website for detail.
RP1366-00P July 2009
1



RICHPOWER RP1366
RP1366
Typical Application Circuit
Preliminary
+
Li-ion
Battery
CFLY1 1uF CFLY2 1uF
4
C1P
7 VIN
CIN Pulse
2.2uF
Input
8
EN
COUT
1uF
16 VNG
5 AGND
13
2
C1N C2P C2N
RP1366
LED1 15
LED2 13
LED3 12
LED4 11
LED5 10
LED6 9
PGND
6, Exposed Pad(17)
Figure 1. For 6-WLEDs Application Circuit
+
Li-ion
Battery
CFLY1 1uF CFLY2 1uF
4
C1P
7 VIN
CIN Pulse
2.2uF
Input
8
EN
COUT
1uF
16 VNG
5 AGND
13
2
C1N C2P C2N
RP1366
LED1 15
LED2 13
LED3 12
LED4 11
LED5 10
LED6 9
PGND
6, Exposed Pad(17)
Figure 2. For 5-WLEDs Application Circuit
30us < tini 0.5us < tHI 0.5us < tLO < 500us
3ms < tSHDN
EN 0
1 2 3 4 5 14
Shutdown
ILEDX
100% 15/16 14/16 13/16 12/16 3/16
2/16
15 0 1
100% 15/16
1/16
Shutdown
Figure 3. Brightness Control by Pulse Dimming
2 RP1366-00P July 2009



RICHPOWER RP1366
Preliminary
RP1366
Functional Pin Description
Pin No.
Pin Name
Pin Function
1
C1N
Negative Terminal of Bucket Capacitor 1.
2
C2N
Negative Terminal of Bucket Capacitor 2.
3 C2P Positive Terminal of Bucket Capacitor 2.
4 C1P Positive Terminal of Bucket Capacitor 1.
5
AGND
Analog Ground.
6
PGND
Power Ground.
7 VIN Supply Input Voltage.
8
EN
Chip Enable (Active High), and this pin should be connected to GPIO pin of
MCU.
9
LED6
Current Sink for LED6. (If not in use, the pin should be connected to VIN)
10
LED5
Current Sink for LED5. (If not in use, the pin should be connected to VIN)
11
LED4
Current Sink for LED4. (If not in use, the pin should be connected to VIN)
12
LED3
Current Sink for LED3. (If not in use, the pin should be connected to VIN)
13
LED2
Current Sink for LED2. (If not in use, the pin should be connected to VIN)
15
LED1
Current Sink for LED1. (If not in use, the pin should be connected to VIN)
14 NC No Internal Connection.
16 VNG
17 (Exposed Pad) GND
Charge Pump Output.
The exposed pad must be soldered to a large PCB and connected to GND for
maximum power dissipation.
Function Block Diagram
C1P C1N C2P C2N
VIN
EN
AGND
PGND
Soft Start
Circuit
UVLO
Gate Driver
1MHz
OSC
Mode Decision
OVP
16 Steps Pulse
Dimming Controller
Shutdown Delay
Current
Bias
Current Source
VNG
LED1
LED2
LED3
LED4
LED5
LED6
RP1366-00P July 2009
3







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