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参数资料
| 型号： | MAX8785ETI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 11/19页 |
| 文件大小： | 0K |
| 描述： | IC CCFL CTRL 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | CCFL 控制器 |
| 电流 - 电源： | 1.5mA |
| 电源电压： | 4.5 V ~ 28 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
Full-Bridge Controller for
Piezoelectric Transformers
Block Diagram
V CC
SHDN
LF
EN
EN
BATT
GND
LINEAR
REGULATOR
4.12V
UVLO
COMPARATOR
BIAS
SUPPLY
V DC
1.6V
PLL AND
DPWM OSC
LSYNC
PCOMP
SEL
PWM
COMPARATOR
RATE
RAMP
DIMMING
HF
IFB
. . F.W.
RECT
VCO
CONTROL
LOGIC
CNTL
V DD1
BST1
800mV
ERROR
AMPLIFIER
1-SHOT
GH1
LX1
V DD2
BST2
COMP
1mA
3.25V
PWM CONTROL LOGIC
GATE-
DRIVER
CONTROL
STATE
VDD1
GH2
LX2
MACHINE
GL1
PGND
2.25V
OVERVOLTAGE
VFB
COMPARATOR
VDD2
GL2
230mV
800mV
SHORT-CIRCUIT
COMPARATOR
FAULT
DELAY
BLOCK
MUX
LX1
LX2
IFB
1.2V
OPEN-LAMP
COMPARATOR
PRIMARY
400mV
CURRENT-LIMIT
COMPARATOR
OLF
Figure 2. MAX8785A Block Diagram
OLF
COMPARATOR
TFLT
FLT
MAX8785A
Detailed Description
The MAX8785A is a full-bridge CCFL controller for piezo-
electric transformer-based CCFL inverters. The full-
bridge topology provides a high-spectral purity
sinusoidal drive to help efficiently operate the piezoelec-
tric transformer. The MAX8785A uses feed-forward
control to adjust the duty cycle that effectively regulates
lamp current during line transients and maintains rela-
tively constant switching frequency. The rate of the feed-
forward ramp signal can be adjusted with an external
resistor to accommodate different input voltage ranges
and different types of piezoelectric transformers.
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相关代理商/技术参数 |
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|---|---|
| MAX8785EVKIT | 功能描述:显示开发工具 MAX8785 Eval Kit RoHS:否 制造商:4D Systems 产品:4Display Shields 工具用于评估:?OLED-160-G1, ?OLED-160-G2 接口类型:Serial 工作电源电压:5 V |
| MAX8786GTL+ | 制造商:Maxim Integrated Products 功能描述:CONVERTOR - Bulk 制造商:Rochester Electronics LLC 功能描述: |
| MAX878LCSA | 制造商:Maxim Integrated Products 功能描述: |
| MAX878LESA | 制造商:Maxim Integrated Products 功能描述: |
| MAX8790AETP+ | 功能描述:LED照明驱动器 Six-String White LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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