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PDF IL9961 Data sheet ( Hoja de datos )
| Número de pieza | IL9961 | |
| Descripción | HIGH STABILITY LED - DRIVER | |
| Fabricantes | IK Semiconductor | |
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TECHNICAL DATA
HIGH STABILITY LED - DRIVER
Microcircuit IL9961 – average current control mode LED driver
IL9961
FEATURES:
Input voltage range VIN from 8 to plus 450 V
Control by average current;
Programmed fixed duration of the current
off state in the induction coil;
Linear light Trimming;
Option of LED brightness Dimming by
low frequency PWM signal
Output short circuit protection;
IL9910 IC pin-to-pin compatibility;
Operating temperatures range - 40 ~ + 125 °C.
APPLICATION:
DC/DC or AC/DC LED drivers;
LED backlight for LCDs;
Universal DC source;
LED panels and screens;
Architecture and decorative LED lighting.
ORDERING INFORMATION
Device
IL9961N
IL9961DT
Package
DIP-8
SOP-8
Packing
Tube
Tape & Reel
2013 December, Ver. 00
1 page  
IL9961
Absolute Maximum Ratings
Symbol
Description
VIN Input voltage
Limit
Min Max
-0.5 470
Unit
V
VDD Voltage, applied to the pin VDD
-0.3 12.3
V
-
Voltage at pin PWMD, CS, LD, GATE,
RT
-0.3 VDD + 0.3
V
Та Limit ambient temperature
-60 150
°С
* 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 under “recommended operating conditions” is not implied.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
Recommended Operating Ratings
Symbol
VIN
VDDMAX
Тj
PDIS
Description
Input voltage1)
Maximum voltage, applied to the pin
VDD
Maximum chip temperature
Dissipated power, in package SO-8
In package SO-16
Limit
Min Max
8 450
– 12
– 150
6502)
–
10002)
1) It is limited by dissipated power in the package
2) Value PDIS is indicated at the ambient temperature of Та ≤ 25 °С
Unit
V
V
°С
mW
2013 December, Ver. 00
5 Page 
IL9961
Input DC Voltage
C1
22uF
450V
U1 IL9961
1
VIN
4
GATE
C2
2.2uF
R4
50kΩ
6
VDD
R3
200kΩ
5
PWM
7
LD
C3
1uF
2
CS
8
RT
3
GND
D2
L1
Q1
R1 R2
LEDs
IL9961 Linear Dimming Control Schematic
PWM-attenuation is performed by means of application of the external PWM-signal at the pin
PWMD. PWM-signal may be generated by the microcontroller or the pulse generator with the
pulse fill-up ratio, proportionate to the LEDs dimming rate. This signal permits or denies the LEDs
current modulation depending on the pulse shape. In this mode the current value through LEDs
may be in one of two positions: zero or the current nominal value, preset by means of the reading
resistor, connected to the source of the external MOSFET-transistor. Using the given method, it
is impossible to attain the LEDs’ brightness over the value, which is limited by the internally pre-
set threshold of the comparator actuation. When using the PWM-attenuation in operation of IC
IL9961, LEDs’ brightness is adjusted from 0 to 100 %. Accuracy of the PWM-attenuation method
is limited only by the minimum pulse duration, arriving at the gate of the external MOSFET-
transistor, which constitutes fractions of percent from the fill-up ratio of the PWM-signal pulses.
2013 December, Ver. 00
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet IL9961.PDF ] | |
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