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부품번호 | IL3361D 기능 |
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기능 | LED Driver | ||
제조업체 | Integral | ||
로고 | |||
IL3361D/ IL3361DH/ IZ3361
LED Driver with Average-Mode Constant Current Control
(functional analog HV9961 Supertex Inc.)
The IL3361 is an average current, mode control LED driver IC operating in a constant off-time
mode. This control IC does not produce a peak-to-average error, and therefore greatly im-
proves accuracy, line and load regulation of the LED current without any need for loop com-
pensation or high-side current sensing. The output LED current accuracy is ±3%. The IL3361
can be powered from an 8.0 - 450 VDC supply. The output current can be programmed by an
internal 272 mV reference, or controlled externally through a 0 - 1.5 V dimming input.
FEATURES:
• Fast average current control
• Programmable constant off-time switching
• Linear dimming input
• PWM dimming input
• Output short circuit protection
• Ambient operating temperature
-40oC to +125oC
• Pin-compatible with the IL9910 IC
APPLICATIONS:
• DC/DC or AC/DC LED driver applications
• LED backlight driver for LCD displays
• General purpose constant current source
• LED signage and displays
• Architectural and decorative LED lighting
• LED street lighting
Block diagram:
General view of ICs:
IL3361D (plastic SO-8 case)
IL3361DH (plastic SO-16 case)
IZ3361 (dice)
Typical application circuit:
1
Ver.00/20.03.2012
IL3361e_tsp
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IL3361D/ IL3361DH/ IZ3361
Symbol Description
Min Typ Max Units Conditions
Short Circuit Protection
VCS
TDELAY
THICCUP
Hiccup threshold voltage
Current limit delay CS-to-GATE
Short circuit hiccup time
410 - 470 mV -
- - 150 ns CS = VCS+30mV
- 395 - μs -
TON(min) Minimum on-time (short circuit)
- - 430 ns CS = VDD
TOFF TIMER
TOFF
Off time
8 - 12 μs RT = 226 kΩ
32 - 48
RT = 1.00 MΩ
GATE Driver
ISOURCE
ISINK
tRISE
tFALL
Notes
GATE sourcing current
GATE sinking current
GATE output rise time
GATE output fall time
0.165
0.165
-
-
-
-
-
-
- A VGATE = 0V, VDD = 7.5V
- A VGATE = Vdd, VDD = 7.5V
50 ns CGATE = 500pF, VDD = 7.5V
50 ns CGATE = 500pF, VDD = 7.5V
1. Also limited by package power dissipation limit, whichever is lower.
* Denotes the specifications which apply over the full operating ambient temperature range of
-40°C < TA < +125°C.
Application Information
Peak-current control (as in IL9910) of a buck converter is the most economical and
simple way to regulate its output current. However, it suffers accuracy and regulation problems
that arise from the so-called peak-to-average current error, contributed by the current ripple in
the output inductor and the propagation delay in the current sense comparator. The full induc-
tor current signal is unavailable for direct sensing at the ground potential in a buck converter
when the control switch is referenced to the same ground potential because the control switch
is only conducting for small periods. While it is very simple to detect the peak current in the
switch, controlling the average inductor current is usually implemented by level translating the
sense signal from +VIN. Though this is practical for relatively low input voltage VIN, this type of
average-current control may become excessively complex and expensive in the offline AC or
other high voltage DC applications.
The IL3361 employs proprietary control scheme, achieving fast and very accurate con-
trol of average current in the buck inductor through sensing the switch current only. No com-
pensation of the current control loop is required. The LED current response to PWM_D input is
similar to that of the IL9910. The inductor current ripple amplitude does not affect this control
scheme significantly, and therefore, the LED current is independent of the variation in induc-
tance, switching frequency or output voltage. Constant off-time control of the buck converter is
used for stability and to improve the LED current regulation over a wide range of input volt-
ages. (Note that, unlike IL9910, the IL3361 does not support the constant-frequency mode of
operation.)
The typical output characteristic of the IL3361 LED driver is shown in Figure 1. The cor-
responding IL9910 characteristic is given for the comparison.
Ver.00/20.03.2012
4 IL3361e_tsp
338944
4페이지 IL3361D/ IL3361DH/ IZ3361
DH SUFFIX PLASTIC SOP
(MS-012AC)
D
16
9
E1 H
1
-T-
G8
b
0.25 (0.010) M T
A1 A
Mounting
plane
α
α
h x 45
L
c
D E1 A b h e α L H c A1
mm
min 9,80 3,80 1,35 0,33 0,25
0° 0,40 5,80 0,19 0,10
max 10,00 4,00 1,75 0,51 0,50 1,27 8° 1,27 6,20 0,25 0,25
inches
min
max
0,386
0,394
0,150 0,053
0,157 0,069
0,013
0,020
0,010
0,020
0,050
0°
8°
0,016 0,228 0,007 0,004
0,050 0,244 0,010 0,010
Ver.00/20.03.2012
7 IL3361e_tsp
338944
7페이지 | |||
구 성 | 총 8 페이지수 | ||
다운로드 | [ IL3361D.PDF 데이터시트 ] |
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
IL3361D | LED Driver | Integral |
IL3361DH | LED Driver | Integral |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |