参数资料
| 型号： | MAX8759ETI+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 16/32页 |
| 文件大小： | 0K |
| 描述： | IC CNTRL CCFL BACKLIGHT 28TQFN |
| 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： | 30 ~ 80 kHz |
| 电流 - 电源： | 2.5mA |
| 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) |
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Low-Cost, SMBus, CCFL Backlight Controller
V BATT
V BATT
NH1
ON
NL1
OFF
NH1
OFF
NL1
ON
LX1
LX1
C2
C2
(a)
V BATT
T1
T1
LX2
LX2
NH2
OFF
NL2
ON
NH2
OFF
NL2
ON
NH1
OFF
NL1
ON
NH1
OFF
NL1
ON
LX1
LX1
C2
C2
(c)
V BATT
T1
T1
LX2
LX2
NH2
ON
NL2
OFF
NH2
OFF
NL2
ON
(BODY DIODE TURNS ON FIRST)
(b)
Figure 4. Resonant Operation
The second peak f P is the parallel resonant peak deter-
mined by the secondary leakage inductance (L), the
parallel capacitor (C P ), and the series capacitor reflect-
ed to the secondary (C’ S ):
(BODY DIODE TURNS ON FIRST)
(d)
resonant converter. While in parallel-loaded resonant
operation, the inverter behaves like a voltage source to
generate the necessary striking voltage. Theoretically,
the output voltage of the resonant converter increases
f P =
2 π L
1
′
C S C P
′
C S + C P
until the lamp is ionized or until it reaches the IC’s sec-
ondary voltage limit. Once the lamp is ionized, the
equivalent load resistance decreases rapidly and the
operating point moves toward the series resonant peak.
While in series resonant operation, the inverter behaves
The inverter is designed to operate between these two
resonant peaks. When the lamp is off, the operating
point of the resonant tank is close to the parallel reso-
nant peak due to the lamp’s infinite impedance. The cir-
cuit displays the characteristics of a parallel-loaded
like a current source.
Lamp-Current Regulation
The MAX8759 uses a lamp-current control loop to regu-
late the current delivered to the CCFL. The heart of the
control loop is a transconductance error amplifier. The
16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8759EVKIT | 功能描述:显示开发工具 MAX8759 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 |
| MAX875ACPA | 制造商:Rochester Electronics LLC 功能描述: |
| MAX875ACPA+ | 功能描述:基准电压& 基准电流 2.5/5/10V Precision Voltage Reference RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
| MAX875ACSA | 制造商:Maxim Integrated Products 功能描述:- Bulk |
| MAX875ACSA+ | 功能描述:基准电压& 基准电流 2.5/5/10V Precision Voltage Reference RoHS:否 制造商:STMicroelectronics 产品:Voltage References 拓扑结构:Shunt References 参考类型:Programmable 输出电压:1.24 V to 18 V 初始准确度:0.25 % 平均温度系数（典型值）:100 PPM / C 串联 VREF - 输入电压（最大值）: 串联 VREF - 输入电压（最小值）: 分流电流（最大值）:60 mA 最大工作温度:+ 125 C 封装 / 箱体:SOT-23-3L 封装:Reel |
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