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FAN7711 — Ballast Control Integrated Circuit
May 2007
FAN7711
Ballast Control Integrated Circuit
Features
Floating Channel for Bootstrap Operation to +600V
Low Start-up and Operating Current: 120μA, 3.2mA
Under-Voltage Lockout with 1.8V of Hysteresis
Adjustable Run Frequency and Preheat Time
Internal Active ZVS Control
Internal Protection Function (Latch Mode)
Internal Clamping Zener Diode
High Accuracy Oscillator
Soft-Start Functionality
Description
The FAN7711, developed with Fairchild’s unique high-
voltage process, is a ballast control integrated circuit (IC)
for a fluorescent lamp. FAN7711 incorporates a preheating
/ ignition function, controlled by an user-selected external
capacitor, to increase lamp life. The FAN7711 detects
switch operation from after ignition mode through an
internal active Zero-Voltage Switching (ZVS) control
circuit. This control scheme enables the FAN7711 to
detect an open-lamp condition, without the expense of
external circuitry, and prevents stress on MOSFETs. The
high-side driver built into the FAN7711 has a common-
mode noise cancellation circuit that provides robust
operation against high-dv/dt noise intrusion.
8-SOP
8-DIP
Applications
Electronic Ballast
Ordering Information
Part Number
FAN7711N
FAN7711M
FAN7711MX
Package
8-DIP
8-SOP
Pb-Free
Yes
Operating Temperature Range
-25°C ~ 125°C
Packing Method
Tube
Tube
Tape & Reel
Typical Application
D5
R1
U1
D1
D2
D6
R3
V
DD
C1
Main
Supply
1
2
FAN7711
3
4
8
7
6
5
V
B
HO
V
S
LO
R5
Q2
R4
Q1
C4
D7
C5
L1
C6
RT
CPH
D3
D4
GND
C2
R2
C3
Lamp
C7
FAN7711 Rev. 1.00
Figure 1. Typical Application Circuit for Compact Fluorescent Lamp
为了在产品众多、竞争激烈的市场上使产品与众不同，手持设备的制造商们往往把电池寿命和电源管理作为手机、PDA、多媒体播放器、游戏机、其它便携式消费类设备等产品的关键卖点来考虑。用户是从电池寿命这方面来看待电源管理的成效，其实它是多种因素共同作用的结果，这些因素包括 CPU 功能、系统软件、中间件，以及使用户可以在更长的充电或更换电池的间隔时间内享用各自设备的策略。 电源管理范围 任...[详细]
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