参数资料
| 型号： | MAX8709BETI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/24页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR CCFL HI EFF 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 |
| 频率： | 25 ~ 300 kHz |
| 电流 - 电源： | 1.5mA |
| 电流 - 输出： | 500mA |
| 电源电压： | 4.6 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) |
High-Efficiency CCFL Backlight
Controller with SMBus Interface
Pin Description
PIN
1
2
3
4
5
6
7
8
9, 10, 11, 23
12
13
14
15
16
17
18
19
20
21
22
24
25
NAME
ILIM
REF
LOT
GND
ISEC
SDA
SCL
SUS
N.C.
V DD
PGND
GL2
GL1
GH1
LX1
BST1
BST2
LX2
GH2
VFB
IFB
CCI
FUNCTION
Current-Limit Threshold Adjustment. Connect a resistive voltage-divider between REF or V CC and GND.
The current-limit threshold measured between LX_ and GND is 1/5 the voltage forced at ILIM. The ILIM
adjustment range is 0 to 3V. Connect ILIM to V CC to select the default current-limit threshold of 0.2V.
2V Reference Output. Bypass REF to GND with a 0.1μF ceramic capacitor. REF is discharged to GND
during shutdown.
Lamp-Out Threshold Adjustment. The lamp-out threshold is 30% of the voltage at LOT. The LOT
adjustment range is from 0.5V to V REF .
Analog Ground. The ground return for V CC , REF, and other analog circuitry. Connect GND to PGND
under the IC at the IC’s backside exposed metal pad.
Secondary Current-Limit Sense Input. The secondary current limit controls the transformer secondary
current even if the IFB sense resistor is shorted. See the Secondary Current Limit (ISEC) section.
SMBus Serial Data Input
SMBus Serial Clock Input
SMBus Suspend Input
No Connection. Not internally connected.
Gate-Driver Supply Input. Connect V DD to V CC , the output of the linear regulator. Bypass V DD with a
0.1μF capacitor to PGND.
Power Ground. Gate-driver current flows through this pin.
Low-Side MOSFET NL2 Gate-Driver Output
Low-Side MOSFET NL1 Gate-Driver Output
High-Side MOSFET NH1 Gate-Driver Output
Switching Node Connection. LX1 is the internal gate driver’s (GH1’s) source connection for the high-side
MOSFET NH1. LX1 is also the sense input to the current comparators.
Driver Bootstrap Input for High-Side MOSFET NH1. Connect BST1 through a diode to V DD and through a
0.1μF capacitor to LX1 (Figure 1).
Driver Bootstrap Input for High-Side MOSFET NH2. Connect BST2 through a diode to V DD and through a
0.1μF capacitor to LX2 (Figure 1).
Switching Node Connection. LX2 is the internal gate driver’s (GH2’s) source connection for the high-side
MOSFET NH2. LX2 is also the sense input to the current comparators.
High-Side MOSFET NH2 Gate-Driver Output
Lamp Output Feedback Sense Input. The average value on VFB is regulated during startup and open-
lamp conditions to 0.5V by controlling the on-time of high-side switches. A capacitive voltage-divider
between the CCFL lamp output and GND is sensed to set the maximum average lamp output voltage.
Lamp Current-Sense Input. The voltage on IFB is used to regulate the lamp current. If the IFB input falls
below 30% of the LOT voltage for 1.22s, then the MAX8709B activates the lamp-out fault latch.
Current-Loop Compensation Pin. CCI is the output of the current-loop transconductance amplifier (GMI)
that regulates the CCFL current. The CCI voltage controls the time interval during which the full bridge
applies the input voltage (BATT) to the transformer primary. Connect CCI to GND through a 0.1μF
capacitor. CCI is internally discharged to GND in shutdown.
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8709ETI | 功能描述:显示驱动器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX8709ETI+ | 功能描述:显示驱动器和控制器 CCFL Backlight Controller w/SMBus RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX8709ETI+T | 功能描述:显示驱动器和控制器 CCFL Backlight Controller w/SMBus RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX8709ETI-T | 功能描述:显示驱动器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作电源电压:2.7 V to 5.5 V 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Reel |
| MAX8709EVKIT | 功能描述:显示开发工具 MAX8709 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 |
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