Driver IC. CN5710 Datasheet
1A High Brightness LED Driver IC
The CN5710 is a current regulation integrated circuit
operating from an input voltage of 2.8V to 6V, the
constant output current can be set up to 1A with an
external resistor. The CN5710 is ideal for driving
LED. The on-chip power MOSFET and current
sense block greatly reduce the number of external
component count. The CN5710 adopts the
temperature regulation instead of temperature
protection function, the temperature regulation can
make the LED being turned on continuously in case
of high ambient temperature or high voltage drop.
Other features include chip enable,etc.
CN5710 is available in 5pin SOT89 package.
Operating Voltage Range: 2.8V to 6V
On-chip Power MOSFET
Low Dropout Voltage: 0.25V @ 800mA
LED Current up to 1A
Output Current Accuracy: ± 5%
Chip Temperature Regulation
Over LED Current Protection
Operating Temperature Range:
－40 ℃ to ＋85 ℃
Available in SOP8 Package
Pb-free, Rohs Compliant, Halogen Free
High-brightness LED driver
Emergency lights and lighting
Typical Application Circuit
Figure 1 Typical Application Circuit
Part No. Package
Tape and reel, 1000/Reel
－40℃ to 85℃
Figure 2 Functional Block Diagram
6 Exposed Pad
Chip Enable Input. A high input will put the device in the normal operating
mode. Pulling the CE pin to low level will put the CN5710 into disable mode.
The CE pin can be driven by TTL or CMOS logic level.
The Negative Terminal of Power Supply.
LED Current Setting Pin. LED pin current is set by a resistor RISET which is
connected between ISET pin and GND, the current is calculated by:
ILED = 1800V／RISET
ILED is LED pin current and is in ampere (A)
RISET is the resistance from ISET pin to GND in ohms.
RISET’s maximum value is 30K ohm.
The Positive Terminal of Power Supply. The internal circuit is powered by
The Anode of LED. LED’s anode is connected to this pin, and LED current
flows out of this pin.
Soldered to GND.
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage (With respect to GND)
VCC..............…...…………....-0.3V to +6.5V
Other terminal voltage………....-0.3V to VCC
Maximum Junction Temperature.......... 150°C
Thermal Resistanc(Juction to Case)….…..60°C/W
Operating Temperature.…..………...-40 to +85°C
Storage Temperature.......……........-65 to +150°C
Lead Temperature (soldering, 10s) ...........+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. These are stress ratings only, and 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 affect device reliability.