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HY7700 PDF даташит

Спецификация HY7700 изготовлена ​​​​«Oristreak» и имеет функцию, называемую «High Brightness LED Driver».

Детали детали

Номер произв HY7700
Описание High Brightness LED Driver
Производители Oristreak
логотип Oristreak логотип 

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HY7700 Даташит, Описание, Даташиты
Description
HY7700 is a PWM high-efficiency LED
driver controller IC. It allows efficient
operation of High Brightness HBLED(s)
from voltage sources ranging from 9VDC up
to 450VDC. HY7700 controls an external
MOSFET at variable switching frequency up
to 300 kHz. The constant off-time can be
programmed using a single resistor. The LED
string is driven at constant current rather than
constant voltage, thus providing constant
light output and enhanced reliability. The
output current can be programmed between
a few milliamps and up to more than 1.0A
.
Typical Applications Circuit
HY7700
High Brightness LED Driver
Features
n >90% efficiency.
n 9V to 450V input Range.
n Constant Current LED driver.
n More than 1.0A output applications.
n PWM Low-Frequency Dimming via
Enable pin.
n Input Voltage Surge ratings up to 450V.
Applications
n DC/DC LED Driver Application.
n RGB backlighting LED driver.
n Back lighting of flat panel displays.
n LED Lighting Application
n Automotive LED Lighting Application.
Copyright © 2009 Oristreak Ltd.,
HTTP://WWW.ORISTREAK.COM
-1-
HY7700 V1.0









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HY7700 Даташит, Описание, Даташиты
HY7700
High Brightness LED Driver
Marking Information & Pin Configuration
RT LD VDD EN
87
65
HY7700
AYYWW
A : Assembly Location
YY : Year
WW : Weekly
12
34
VIN CS GND DRV
Pin Definition
PIN
NUMBER
1
2
3
4
5
6
7
8
PIN
SYMBOL
VIN
CS
GND
DRV
EN
VDD
LD
RT
PIN DESCRIPTION
Power Supply
Output current set input. Connect a resistor from CS to GND
to set the LED bias current. ILED = 0.25 / RSE
Ground
Output gate driver for an external N-Channel MOSFET.
Enable pin, high active with dimming function.
Internal regulator output which must connect a low ESR
bypass capacitor to ground.
Current sense threshold setting.
When a resistor connects between RT and GND, HY7700
operates in constant frequency mode. When a resistor
connects between RT and DRV, HY7700 operates in
constant off-time mode.
Copyright © 2009 Oristreak Ltd.,
HTTP://WWW.ORISTREAK.COM
-2-
HY7700 V1.0









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HY7700 Даташит, Описание, Даташиты
Block Diagram
HY7700
High Brightness LED Driver
ABSOLUTE MAXIMUM RATINGS
RATING
VIN to GND
CS, LD, EN, DRV, RT
VDD to GND
Junction Temperature Range
Storage Temperature Range
Thermal Impedance: SOP-8
Continuous Power Dissipation TA =+25°C : SOP-8
ESD Protection HBM
VALUE
-0.5 to 450
-0.5 to (VDD+0.3)
12
-40 to 150
-65 to 150
128
830
2000
UNIT
V
V
V
°C/W
mW
V
Copyright © 2009 Oristreak Ltd.,
HTTP://WWW.ORISTREAK.COM
-3-
HY7700 V1.0










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Номер в каталогеОписаниеПроизводители
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