文件名称:
输入电压可达550V的LED驱动用控制IC的设计与实现.pdf
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上传时间: 2019-09-14
详细说明：输入电压可达550V的LED驱动用控制IC的设计与实现pdf,本文详细介绍了输入电压可达550V的LED驱动用控制IC的设计与实现。1. Specifications
1.1 Package Pinout
2 Pin Description
Pin# Name
Description
8R
Input voltage
LED Current Sense input. Internal current
cs应2
7 LD
sense threshold is set at VcS(high).The
external sense resistor sets the maximum led
current
GNd
GND Device Ground
GATE
5PWMD
GATE External MOSFET gate driver output
PWMD Low-frequency PWM dimming control input with
internal pull-down resistor.
Regulated supply voltage output. Requires a
DD storage capacitor to GND Can be overdriven by
external voltage applied to VDD
Linear Dimming. Apply a voltage less than
cS(high) to dim the LED(S)
rr Resistor to GND sets the minimum off-time.
Electrical and thermal conductive pad on the
bottom of CPC9909NE Connect this pad to
ground and provide sufficient thermal coupling
to remove heat from the package
1.3 Absolute Maximum Ratings
Parameter
Symbol
Maximum Unit
Input Voltage to GND
-05to+560
V
Inputs and Outputs Voltage to GND CS, LD, PWMD, GATE-03 to VDD+0.3V
VDD, Externally Applied
DD EXT
15
Power dissipation
SOIC-8 With Thermal Tab
2.5
SOIC-8 W/O Thermal Tab
0.975
W
Junction Temperature, Operating
T
40to+150
Operating Temperature
40to+85
C
Storage Temperature
55to+150
°C
Electrical absolute maximum ratings are at 25C
Absolute maximum ratings are stress ratings
Stresses in excess of these ratings can cause
permanent damage to the device. Functional
operation of the device at conditions beyond those
indicated in the operational sections of this data sheet
is not implied
1.4 Recommended Operating Conditions
Parameter
Symbol
Minimum Typical Maximum Unit
Input Voltage Range
N
12
550
DC
PWMD Frequency
PWMD
500
Hz
Operating temperature
A
40
1.5 Electrical Characteristics
Unless otherwise specified, all electrical specifications are provided for TA=25C
Parameter
Conditions
Symbol Minimum Typical Maximum Unit
Input
Input Voltage Range
DC Input Voltage
8
550
Shut-Down Mode Supply Current VN=8 to 550V, PwMD toGNd N
0.30.6mA
Regulator
VIN=15V to 550V
Voltage Regulator Output
7.8
84
IGATE=O
Vop Current Available
for EXternal Circuitry
D
2
mA
VDD Load Regulation
VIN=15V, IDD =imA
△V
DD
150
200
mV
PWM Dimming
PWMD Input Low Voltage
VIN=8V to 550V
PWMD(low)
0.5
PWMD Input high Voltage
VIN=8V to 550V
PWMD(high)
2.4
PWMD Pull-Down Resistance
R
PWMD
80
115
150
ko
Current Sense Comparator
I Current Sense Input Current
Input Low
CS=0V
5
A
Input High
0
Current Sense Threshold Voltage
40°C
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