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CN5815 Datasheet(PDF) 3 Page - Shanghai Consonance Electronics Incorporated

Part No. CN5815
Description  4.5V to 32V Input, Constant Current Boost HB LED Driver
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Maker  CONSONANCE [Shanghai Consonance Electronics Incorporated]
Homepage  http://www.consonance-elec.com/
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CN5815 Datasheet(HTML) 3 Page - Shanghai Consonance Electronics Incorporated

 
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CONSONANCE
www.consonance-elec.com
3
REV 1.0
Pin Description
No.
Name
Description
1
OVP
Over Voltage Protection Input. The PWM converter turns off when the
voltage of this pin goes to higher than 1.205V(Typical), and returns to normal
operation if the voltage at OVP pin falls below 1.151V(Typical).
2
FB
Feedback Pin. The LED current is feedback to this pin. Generally FB pin should be
connected to an external current sense resistor. In normal operation, the LED current
is decided by the following equation:
Where, ILED is the LED current, RCS is the current sense resistor as shown in Figure 1.
3
COMP
Compensation Pin. Connect the compensation network between COMP pin and
GND.
4
DIM
LED Dimming Input. PWM signal is input to DIM pin. When DIM pin is pulled
low, internal PWM converter is disabled, DRV pin outputs low, no energy is
transferred to LED string; When DIM pin is high, the PWM converter operates
normally.
5
SHDN
Shutdown Input Pin. Pulling this pin high, places the part into a shutdown mode.
Shutdown mode is characterized by a very low quiescent current. In shutdown mode,
all the functionality of all blocks is disabled and the on-chip 5V regulator is also
shutdown. Pulling this pin low places the part into normal operation mode.
6
VIN
Input Supply Voltage. Positive terminal of input supply. The input voltage range is
4.5V to 32V. Connect a local bypass capacitor from this pin to GND.
7
VCC
+5V Regulator output. A bypass capacitor of 4.7uF at least should be connected
from this pin to GND. If the input voltage is less than 5.5V, the voltage at VCC pin
may be less than 5V.
8
DRV
Gate Drive Pin. Gate drive for the external N-channel MOSFET. Connect this pin to
the gate of external N-channel MOSFET.
9
GND
Ground. Negative terminal of input supply.
10
ISW
Inductor Current Sense Pin. The inductor current is sensed at ISW pin on the
cycle-by-cycle basis for both the current mode control and over current protection.
Absolute Maximum Ratings
VIN Terminal Voltage…………..…-0.3V to 36V
Maximum Junction Temperature……………150℃
Other Terminals Voltage…………..-0.3V to 6.5V
Storage Temperature……….......-65℃ to 150℃
Operating Temperature…..............-40℃ to 85℃
Lead Temperature(Soldering)…………...….260℃
Thermal Resistance(Junction to Case) .....200℃/W
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.


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