datasheet for THL6516 by THine Electronics, Inc.

datasheet for THL6516 by THine Electronics, Inc.
Preliminary
THL6516_Rev.0.01_E
THL6516
4 channels LED Driver
Features
Description
THL6516 is a 4 channels LED driver. THL6516 has a
built-in boost converter, since back light system can
consist of 1 chip.
Soft start / Over current protection / Vout short
circuit protection / Under voltage protection /
Over voltage protection / Thermal shut down are
built in.
Mounted area is reducible by 16-pin QFN.
Application
Mobile phone display backlight
Car Navigator display backlight
Laptop/Netbook/Tablet PC display backlight
Input voltage range
4.2V - 24V
Boost converter
Maximum output voltage 40V
Switching frequency range 500kHz – 2MHz
LED driver
Up to 80mA per channel
Current accuracy : +/-3%
PWM dimming control
Protection
Soft start
Over current protection
Vout short circuit protection
Under voltage protection
Over voltage protection
Thermal shut down
3mm x 3mm QFN 16pin package
Block Diagram
VIN
PC
VCC
LX
EN
UVLO
Boost
PGND
Protect
circuit
OVP
OSC
SS
4
OUT1
PWM
OUT2
RT
OSC
OSC
Current
driver
OUT3
OUT4
AGND
REXT
Preliminary
THL6516_Rev.0.01_E
Absolute Maximum Ratings
Parameter
Symbol
VCC
VH1
VH2
VL
Pd
Tj
Tstg
VCC voltage
LX voltage
OUT[4:1] voltage
EN, PWM voltage
Power description
Junction temperature
Storage temperature range
Rating
24
45
43
27
1.67
125
-55
+150
Units
V
V
V
V
W
Max
24
40
2000
Units
V
V
kHz
Recommended Operating Conditions
Parameter
VCC voltage
OUT[4:1] voltage
Switching frequency
Min
4.2
500
Typ
-
Pin Description
Number
1
Name
AGND
2
PC
3
REXT
4
RT
5
PWM
6
EN
7
VCC
8, 9
LX
10, 11
PGND
12
OVP
Over voltage protection
input pin
OUT1
OUT2
OUT3
OUT4
LED current sink
regulation input pins.
13
15
14
16
Function
Analog ground.
Boost converter error
amplifier output pin.
LED current set pin.
Switching frequency
control pin
PWM dimming control
input pin.
Enable pin.
Input supply voltage pin.
Boost converter switching
output pins
Power ground.
Description
Analog ground of LED driver.
This pin is the boost converter error amplifier output.
Please connect resistance and capacitor to GND for phase
compensation.
LED current is set by the value of the external resistor.
This pin is controlled switching frequency by external
resistance.
This pin is control input to LED dimming.
If low level voltage is impressed, the LED driver is
shutdown.
Power supply pin.
These pins are switching output of boost converter.
Power ground pins of boost converter.
This pin is the over voltage protection circuit setting input of
the boost converter for LED driver. This pin is controlled by
external resistance.
These pins are the constant current output.
The constant current is determined by REXT resistor.
Preliminary
THL6516_Rev.0.01_E
Electrical Characteristics
Parameter
at VCC 12V , Ta=25
Symbol
Input quiescent Current
Icc1
Input quiescent Current
Icc2
Standby current
Ist
, unless otherwise noted
Test Conditions
Vpc=0V(No switching)
EN>1.9V
Vpc=2V(Switching),
EN>1.9V
EN<0.8V
Typ
Max
Units
-
1
1.5
mA
-
2
3
mA
-
-
10
uA
UVLO threshold voltage
Vuvlo
-
3.6
-
V
PWM dimming frequency
Fpwm
0.1
-
30
kHz
PWM input high voltage
Vpwm_h
1.9
-
-
V
PWM input low voltage
Vpwm_l
-
-
0.4
V
-
1
-
MHz
91
93
95
%
-
155
-
nsec
-
2
-
A
10
-
80
mA
-
-
3
uA
Boost converter switching
frequency
Maximum duty cycle
Fosc
Rrt=51k
Dmax
Rrt=51k , Vpc=2V
LX ON-resistance
Ron
Minimum ON-time
Ton_min
LX current limit
VCC rising
Min
0.2
Rrt=51k
Ilim
LED current per channel
Iled_max
OUTx pin leakage current
Ileak
VOUT=36V
OUTx pin regulation threshold
Vout
Rrext=4.75k
LED current accuracy
Iled
Rrext=4.75k
LED current matching
Dled
0.56
V
19.4
20.0
20.6
mA
-
-
1.5
%
Over voltage protection threshold
Vovp
-
1.2
-
V
LED short protection
Vled_s
-
8
-
V
Preliminary
THL6516_Rev.0.01_E
Package Dimensions
QFN 16-pin
Connect the Exposed Pad to GND for enhanced thermal performance.
Preliminary
THL6516_Rev.0.01_E
Notices and Requests
1. The product specifications described in this material are subject to change without prior notice.
2. The circuit diagrams described in this material are examples of the application which may not always apply to the
customer’s design. We are not responsible for possible errors and omissions in this material. Please note if errors or
omissions should be found in this material, we may not be able to correct them immediately.
3. This material contains our copyright, know-how or other proprietary. Copying or disclosing to third parties the
contents of this material without our prior permission is prohibited.
4. Note that if infringement of any third party's industrial ownership should occur by using this product, we will be
exempted from the responsibility unless it directly relates to the production process or functions of the product.
5. This product is presumed to be used for general electric equipment, not for the applications which require very high
reliability (including medical equipment directly concerning people's life, aerospace equipment, or nuclear control
equipment). Also, when using this product for the equipment concerned with the control and safety of the
transportation means, the traffic signal equipment, or various Types of safety equipment, please do it after applying
appropriate measures to the product.
6. Despite our utmost efforts to improve the quality and reliability of the product, faults will occur with a certain small
probability, which is inevitable to a semi-conductor product. Therefore, you are encouraged to have sufficiently
redundant or error preventive design applied to the use of the product so as not to have our product cause any social
or public damage.
7. Please note that this product is not designed to be radiation-proof.
8. Customers are asked, if required, to judge by themselves if this product falls under the category of strategic goods
under the Foreign Exchange and Foreign Trade Control Law.
9. The product or peripheral parts may be damaged by a surge in voltage over the absolute maximum ratings or
malfunction, if pins of the product are shorted by such as foreign substance. The damage may cause a smoking
and ignition. Therefore, you are encouraged to implement safety measures by adding protection devices, such as
fuses.
THine Electronics, Inc.
[email protected]
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