LED Driver. RT8300 Datasheet

RT8300 Driver. Datasheet pdf. Equivalent

RT8300 Datasheet
Recommendation RT8300 Datasheet
Part RT8300
Description 4-CH 150mA Constant Current LED Driver
Feature RT8300; ® RT8300 4-CH 150mA Constant Current LED Driver General Description The RT8300 is a 4-CH 150mA con.
Manufacture Richtek
Datasheet
Download RT8300 Datasheet




Richtek RT8300
®
RT8300
4-CH 150mA Constant Current LED Driver
General Description
The RT8300 is a 4-CH 150mA constant current sink LED
driver capable of driving four channel constant currents
with good matching ability and wide range VF variations.
The RT8300 provides four channel constant currents with
less than 3% differences in output current value among
the 4-CH and ICs respectively. The constant current output
is adjustable from 5mA to 150mA via an external resistor
(RISET). The LED brightness can also be adjusted via the
PWMI pin with pulse width modulation from 0% to 100%.
Thus allowing for wide VF variation. Moreover, the RT8300
provides Dynamic Headroom Control (DHC) function which
can generate feedback signal to DC/DC control loop and
regulate the output voltage of the RT8300.
The RT8300 features LED open/short protection. If any
channel has open or short condition, that particular output
channel will be turned off and the FAULT pin will pull low.
The RT8300 also supports Over Temperature Protection
(OTP). When OTP is triggered, all output channels will be
turned off and the FAULT pin will pull low.
The RT8300 is available in DIP-16 (BW) and SOP-16
packages to achieve optimized solution for PCB space.
Features
z 4 Constant Current Output Channels
z Wide Power Supply Voltage Range : 5V to 24V
z Maximum Constant Current Output Voltage : 60V
z Low Dropout Voltage : 600mV at 120mA Output
Current
z Constant Output Current Accuracy Between
Channels : <±3%
z Dynamic Headroom Control (DHC) Function
z Constant Output Current Range : 5mA to 150mA
z Support 400ns Narrow PWM Pulse
z Fault Detection for OTP, LED Open/Short
z RoHS Compliant and Halogen Free
Applications
z LED Backlight
Marking Information
RT8300GN
RichTek
RT8300
GNYMDNN
RT8300GN : Product Number
YMDNN : Date Code
Ordering Information
RT8300
Package Type
N : DIP-16 (BW)
S : SOP-16
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.
RT8300GS
RT8300
GSYMDNN
RT8300GS : Product Number
YMDNN : Date Code
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS8300-00 January 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1



Richtek RT8300
RT8300
Pin Configurations
FB
VIN
PWMI
2
3
14 GND
13 LED1
12 LED2
GND 4
11 GND
ISET 5
10
FAULT
SLP
6
7
9
8
DIP-16 (BW)
LED4
LED3
NC
(TOP VIEW)
GND
GND
PWMI
VIN
FB
ISET
FAULT
SLP
16
2 15
3 14
4 13
5 12
6 11
7 10
89
SOP-16
GND
NC
LED1
LED2
LED3
LED4
NC
GND
Typical Application Circuit
VLED
VLED 60V (Max)
VIN
VH
RPH
PWMI
CIN1
VIN LED1
LED4
FAULT
PWMI
ISET
RISET1
RT8300
LED Driver [1]
GND
SLP
FB
VIN
CIN2
RSLP1
VIN LED1
LED4
FAULT
PWMI
ISET
RT8300
LED Driver [N]
GND
RISET2
SLP
FB
RSLP2
FB (DHC)
CFB
1nF
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS8300-00 January 2012



Richtek RT8300
RT8300
Functional Pin Description
Pin No.
DIP-16 (BW)
3
2
1
5
6
7
4, 11, 14
10, 9, 12, 13
8
SOP-16
3
4
5
6
7
8
1, 2, 9, 16
11 to 14
10, 15
Pin Name
Pin Function
PWMI
VIN
FB
ISET
FAULT
SLP
GND
LED4 to
LED1
NC
Constant Current Output Channel Enable/Disable Input.
High : Enable, Low : Disable
Power Supply Input.
Feedback Control Voltage Output.
Constant Current Set Pin. Connect to an external resistor to
adjust constant current output.
Open Drain Output for Fault Detection.
LED Short Protection Voltage Set Pin.
Ground. The exposed pad must be soldered to a large PCB
and connected to GND for maximum power dissipation.
Constant Current Sink Output.
No Internal Connection.
Function Block Diagram
LED1 LED2 LED3 LED4
VIN
ISET
IOUT
Regulator
DHC Function
Open/Short
Detection
PWMI
GND
Constant Current Control
Circuit with PWM Control
Thermal
Protection
FB
FAULT
SLP
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS8300-00 January 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3







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