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参数资料
| 型号： | MAX1640EVKIT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/12页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT MAX1640, MAX1641 |
| 标准包装： | 1 |
| 系列： | * |
MAX1640/MAX1641
Adjustable-Output, Switch-Mode
Current Source with Synchronous Rectifier
____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 1, T A = +25°C, unless otherwise noted.)
A
B
CURRENT-MODE CHANGE RESPONSE TIME
2ms/div
V IN = 12V, V SET = 1V, R LOAD = 4 Ω, NO OUTPUT CAPACITOR
A: OUTPUT CURRENT, D0 = D1 = 0 1A/div
B: LOAD VOLTAGE, AC coupled, 500mV/div
0A
0V
A
B
EXITING OFF MODE
20 μ s/div
V IN = 12V, R LOAD = 4 Ω
A: D0 = D1 = 1 2V/div
B: OUTPUT CURRENT, 0.5A/div
______________________________________________________________Pin Description
PIN
1
2
3, 4
5
6
7
8
9
10
11
12
13
14
15
16
NAME
LDOL
TOFF
D1, D0
CC
REF
SET
TERM
GND
CS-
CS+
PGND
NDRV
PDRV
LDOH
IN
FUNCTION
Internal, Ground-Referenced Low-Dropout Linear Regulator Output.
Bypass LDOL with a 0.1μF capacitor in parallel with a 4.7μF capacitor to GND.
Off-Time Select Input. A resistor (R TOFF ) connected from TOFF to GND programs the off-time for the hys-
teretic PWM step-down converter. This resistor also sets the period in duty-cycle mode. See Duty-Cycle
Mode and Programming the Off-Time.
Digital Inputs. Select mode of operation (Table 1).
Constant-Current Loop Compensation Input. Bypass CC with a 0.01μF capacitor to GND.
Reference Voltage Output (V REF = 2V). Bypass REF with a 0.1μF capacitor to GND.
Current Select Input. Program the desired current level by applying a voltage at SET between 0V and V REF ,
(I = V SET / 13.3R SENSE ). See Figure 2.
Maximum Output Voltage Termination Input. When V TERM exceeds the reference voltage, the comparator
resets the internal PWM latch, shutting off the external P-channel FET.
Ground
Negative Current-Sense Comparator Input
Positive Current-Sense Comparator Input
High-Current Ground Return for the output drivers
Gate Drive for an optional N-channel FET synchronous rectifier
Gate Drive for the P-channel FET
Internal, Input-Referenced Low-Dropout Linear Regulator Output.
Bypass LDOH with a 0.33μF capacitor to IN.
Power-Supply Input. Input of the internal, low-dropout linear regulators.
Maxim Integrated
5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1641C/D | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1641EEE | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1641EEE+ | 功能描述:电流型 PWM 控制器 Adj-Out Switch Mode Current Source RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1641EEE+T | 功能描述:电流型 PWM 控制器 Adj-Out Switch Mode Current Source RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX1641EEE-T | 功能描述:电流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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