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参数资料
| 型号： | MAX17100ETM+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 26/35页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST INT-SWITCH 48-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | LCD 电视机/监控器 |
| 电源电压： | 2.5 V ~ 6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-WFQFN 裸露焊盘 |
| 供应商设备封装： | 48-TQFN-EP（6x6） |
| 包装： | 带卷 (TR) |
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Internal-Switch Boost Regulator with Integrated Scan
Driver, VCOM Calibrator, and Op Amp for TFT LCDs
Loop Compensation
4) Calculate R RSET :
Choose R COMP to set the high-frequency integrator gain
for fast transient response. Choose C COMP to set the
integrator zero to maintain loop stability. For low-ESR out-
R RSET =
V MAX
20 × (V MAX - V MIN )
× R A
put capacitors, use the following equations to obtain sta-
ble performance and good transient response:
5) Verify that I RSET does not exceed 120μA:
R COMP ≈
253 × V IN × V OUT × C OUT
L × I MAIN(MAX)
I RSET =
V SUP
20 × R RSET
C COMP ≈
I O U T) × C OUT
10 × I MAIN(MAX) × R COMP
6) If I RSET exceeds 120μA, return to step 2 and choose
a larger value for R A .
To further optimize transient response, vary R COMP in
20% steps and C COMP in 50% steps while observing
transient-response waveforms.
Setting the VCOM Adjustment Range
See Figure 10 for the VCOM calibrator functional dia-
gram. The external resistive voltage-divider sets the
maximum value of the VCOM adjustment range. R RSET
sets the full-scale sink current, I OUT , which determines
the minimum value of the VCOM adjustment range.
Large R RSET values increase resolution, but decrease
the VCOM adjustment range. Calculate R A , R B , and
R RSET using the following procedure:
1) Choose the maximum VCOM level (V MAX ), the minimum
VCOM level (V MIN ), and the V MAIN supply voltage.
2) Select R A between 10k ? and 500k ? based on the
acceptable power loss from the V MAIN supply rail
connected to SUP.
7) The resulting resolution is:
(V MAX - V MIN )
127
A complete design example follows:
V MAX = 4V, V MIN = 2.4V, V SUP = 8V
If R A = 200k ? , then R B = 200k ? , and R RSET = 24.9k ? .
Resolution = 12.5mV.
Charge Pumps
Selecting the Number of Charge-Pump Stages
For highest efficiency, always choose the lowest number
of charge-pump stages that meet the output require-
ment. Figures 11 and 12 show the positive and negative
charge-pump output voltages for a given V MAIN for one-,
two-, and three-stage charge pumps. The number of
positive charge-pump stages is given by:
n POS = GHON DROPOUT MAIN
3) Calculate R B :
R B =
V MAX
V SUP -V MAX
× R A
V +V -V
V MAIN -2 × V D
80
POSITIVE CHARGE-PUMP
OUTPUT VOLTAGE vs. V MAIN
0
NEGATIVE CHARGE-PUMP
OUTPUT VOLTAGE vs. V MAIN
V D = 0.5V
V N = 0.5V
1-STAGE
70
60
50
40
3-STAGE CHARGE PUMP
2-STAGE
CHARGE PUMP
-10
-20
-30
CHARGE PUMP
2-STAGE
CHARGE PUMP
-40
30
20
10
1-STAGE CHARGE PUMP
-50
-60
3-STAGE
CHARGE PUMP
10
12
14
16
18
20
10
12
14
16
18
20
V MAIN (V)
Figure 11. Positive Charge-Pump Output Voltage vs. V MAIN
V MAIN (V)
Figure 12. Negative Charge-Pump Output Voltage vs. V MAIN
26
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| MAX17100EVKIT+ | 功能描述:电源管理IC开发工具 MAX17100 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX17101+SMP | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX17101ETJ+ | 功能描述:DC/DC 开关控制器 Dual PWM Step-Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX17101ETJ+T | 功能描述:DC/DC 开关控制器 Dual PWM Step-Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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