Datasheet.kr   

ACE716E 데이터시트 PDF




ACE Technology에서 제조한 전자 부품 ACE716E은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 ACE716E 자료 제공

부품번호 ACE716E 기능
기능 Variable Frequency Step-up DC/DC Converter
제조업체 ACE Technology
로고 ACE Technology 로고


ACE716E 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.



전체 10 페이지수

미리보기를 사용할 수 없습니다

ACE716E 데이터시트, 핀배열, 회로
ACE716E
Max 38V, Variable Frequency Step-up DC/DC Converter
Description
The ACE716E is a high efficiency step-up converter with an internally integrated 40V power MOSEFT.
It runs with an optimal 0.8MHz frequency that enables use of small external components while still
providing best efficiencies. It has an internal current limit as high as 1A, and it can drive up to 10 LEDs at
50mA output current. The incorporated 25-100KHz true PWM-Dimming feature by EN pin can be used to
digitally program the LED current. For maximum protection, the ACE716E has an internal OVP protection
at 38V to prevent the chip from damages when the LED string is not connected to the output.
ACE716E is available in a space-saving SOT23-6 package.
Features
Up to 90% Efficiency (6 LEDs)
Drive up to 10 LEDs with 50mA
Drive up to 40 LEDs in total
38V OVP protection
True PWM Brightness Control
200mV Feedback Voltage
1A current limit
SOT23-6 Package
Application
Cellphone and Smartphone
MID or Tablet PC
TFT-bias for LCD screen
Power for OLED
LED torch
Satellite Set Top Box
Absolute Maximum Rating
Parameter
Value
SW Voltage
-0.3V~38V
All Other PIN Voltages
-0.3V~6.5V
SW to ground current
Internally limited
Operating Temperature Range
-40~85
Storage Temperature Range
-55~150
Thermal Resistance (Θjc)
SOT23-6
ΘJA ΘJC
100 50 /W
Note: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect device reliability.
VER 1.2 1




ACE716E pdf, 반도체, 판매, 대치품
Typical Application
ACE716E
Max 38V, Variable Frequency Step-up DC/DC Converter
USB Power Application Circuit
VOUT = 0.2x(1+R1/R2)
Note: The Pin6, Vin Pin of ACE716E
is connected to 5V, not the battery input.
Circuit lefthand is only for output than 5.5V!
Please connect Pin6 to input if output is to
Be larger than 5.5V.
VER 1.1
4

4페이지










ACE716E 전자부품, 판매, 대치품
ACE716E
Max 38V, Variable Frequency Step-up DC/DC Converter
FUNCTIONAL DECRIPTIONS
The ACE716E is a high efficiency boost LED driver with a small package size. The device is ideal for
driving 2-25LEDs for backlight application in smartphone and 7-inch tablet PC. The device integrates a
38V/1A switch FET and operates in pulse width modulation (PWM) with a 0.8MHz fixed switching
frequency. For operation details, please check the block diagram in the “Block Diagram” chapter. The duty
cycle of the converter is set by the error amplifier output and the current signal applied to the PWM
control comparator. The feedback loop regulates the FB pin to a low reference voltage (200mV typical),
reducing the power dissipation in the current sense resistor.
Output Open Circuit Protection
Output open circuit protection circuitry prevents IC damage as the result of output open circuit (e.g. LED
string absence). The ACE716E monitors the voltage at the SW pin and FB pin during each switching
cycle. The circuitry turns off the switch FET and shuts down the IC when both of the following conditions
persist for 8 switching clock cycles: (1) the SW voltage exceeds the VOVP threshold, which is 38V and (2)
the FB voltage is less than half of regulation voltage. As a result, the output voltage falls to the level of the
input supply. The device remains in shutdown mode until it is enabled by toggling the EN pin logic. The
output voltage plus the 200mV reference voltage cannot exceed the minimum OVP threshold or OUTPUT
VOLTAGE + 200 mV ≤ VOVP(MIN).
Shutdown
The ACE716E enters shutdown mode when the EN voltage is logic low for more than 3ms. During
shutdown, the input supply current for the device is less than 1μA (max). Although the internal FET does
not switch in shutdown, there is still a DC current path between the input and the output through the
inductor and Schottky diode.
For LED driving application, the minimum forward voltage of the LED array must exceed the maximum
input voltage to ensure that the LEDs remain off in shutdown. However, in the typical application with two
or more LEDs, the forward voltage is large enough to reverse bias the Schottky and keep leakage current
low.
LED Driving Current Setting
The FB voltage is regulated by a low 0.2V reference voltage. The LED current is set externally using a
current-sense resistor in series with the LED string. The value of the RSET is calculated using Equation
1.2:
ILED =0.2/RSET
(1.2)
Where
ILED = output current of LEDs, RSET = current sense resistor
The output current tolerance depends on the FB accuracy and the current sensor resistor accuracy.
PWM Dimming Control or Output Voltage Programming
When the CTRL pin is constantly high, the FB voltage is regulated to 200mV typically. However, the EN
pin allows a PWM signal to reduce this regulation voltage; therefore, it achieves LED brightness dimming
or output voltage programming (only to make output voltage lower). The relationship between the duty
cycle and FB voltage is given by Equation 2.
VER 1.1
7

7페이지


구       성 총 10 페이지수
다운로드[ ACE716E.PDF 데이터시트 ]

당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는

포괄적인 데이터시트를 제공합니다.


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 ]



관련 데이터시트

부품번호상세설명 및 기능제조사
ACE716E

Variable Frequency Step-up DC/DC Converter

ACE Technology
ACE Technology

DataSheet.kr       |      2020   |     연락처      |     링크모음      |      검색     |      사이트맵