Driver IC. CN5502 Datasheet
High-Voltage, Linear High-Brightness LED Driver IC
with Analog and PWM Dimming Control
The CN5502 current regulator operates from a 4V to
32V input voltage range and delivers up to a total of
1A to one or more strings of high-brightness LEDs.
The output current of the CN5502 is adjusted by
using an external current-sense resistor in series with
the LEDs. A dual-mode DIM pin and on-chip 130Hz
PWM generator allow PWM dimming with an
analog or PWM input signal. The analog control
signal at dimming input DIM allows for a
theater-dimming effect to be implemented. The
CN5502 is well suited for applications requiring
high-voltage input and is able to withstand
automotive load-dump events up to 32V. An on-chip
power MOSFET minimizes external components
while providing ±5% output current accuracy.
Also an EQ pin is adopted for equalizing LED
current among multiple CN5502 used in parallel.
Additional features include a 5V regulated output
and thermal regulation, etc.
The CN5502 is available in a thermally enhanced
8-pin SOP package and 8-pin DFN package.
4V to 32V Operating Voltage
Adjustable LED Current up to 1A
On-chip 130Hz PWM Generator
Flexible Dimming Control, Analog or PWM
Control Signal for PWM and Theater Dimming
External PWM Frequency: 80Hz to 400Hz
Integrated 32V, 1A MOSFET with 1.5A
Low Current-Sense Voltage Reduces Power
Typical 5% LED Current Accuracy
High-Voltage Chip Enable Input for Dimming
Current Equalizing Among Multiple CN5502
Used in Parallel
Operating Temperature Range:
－40℃ to 85℃
Available in Thermally-enhanced 8 pin SOP or
8-pin DFN package.
Pb-free，Rohs Compliant and Halogen Free
Automotive Interior and Exterior
Signage and Beacons
Typical Application Circuit
Figure 1 Typical Application Circuit(Analog Dimming)
Figure 2 Typical Application Circuit(PWM Dimming)
Tape and Reel, 2500/Reel
Tape and Reel, 5000/Reel
－40℃ to 85℃
LED Current Equalizing Pin. This pin should be connected to other
CN5502’s EQ pin for equalizing LED current when multiple CN5502 are used
in parallel to drive multiple LED strings, otherwise, EQ pin should be left
High Voltage Enable Pin. Drive EN pin to high to enable the output.
Ground Terminal. This pin is the negative terminal of input supply.
LED Current Sense Pin. The LED current is sensed and set by the resistor
between CS pin and GND. The equation to calculate the LED current is:
ILED ＝ 0.153÷(RCS＋0.03)
Where, ILED is the LED current in ampere(A)
RCS is the resistance from CS pin to GND in ohm(Ω)
Current Sink Pin. Drain of the on-chip power MOSFET，the LED string(s)
should be connected between LED pin and VIN.
Positive Terminal of Input Supply. This pin is the power supply of internal
＋5V Regulator Output Pin. A voltage of 5V(Typical) is output out of this
pin with 3mA output capability.
Connnect a capacitor of 2.2uF to 10uF from VCC pin to GND.
Dimming Control Input. Either an analog or PWM control signal can be input
to this pin to control LED’s brightness.
Exposed Pad. Connect to the GND plane for effective power dissipation. Do
not use as the only ground connection.
Absolute Maximum Ratings
VIN, EN and LED Pin Voltage…..…－0.3V to 36V
Other Pins Voltage…….…….……..－0.3V to 6.5V
Thermal Resistance(Junction to Case) …....65℃/W
Operating Temperature…............－40℃ to 85℃
Maximum Junction Temperature………….150℃
Storage Temperature………......－65℃ to 150℃
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 above those indicated in the operational
sections of the specifications is not implied. Exposure to Absolute Maximum Rating Conditions for extended periods may affect