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参数资料
| 型号： | MAX1641C |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | Adjustable-Output, Switch-Mode Current Sources with Synchronous Rectifier |
| 中文描述： | 可调输出，开关模式同步整流电流源 |
| 文件页数： | 5/11页 |
| 文件大小： | 116K |
| 代理商： | MAX1641C |
M
Adjustable-Output, S witc h-Mode
Current S ourc e with S ync hronous Rec tifier
_______________________________________________________________________________________
5
____________________________Typic al Operating Charac teristic s (c ontinued)
(Circuit of Figure 2, T
A
= +25°C, unless otherwise noted.)
A: OUTPUT CURRENT, D0 = D1 = 0 1A/div
B: LOAD VOLTAGE, AC coupled, 500mV/div
V
IN
= 12V, V
SET
= 1V, R
LOAD
= 4
,
NOOUTPUT CAPACITOR
CURRENT-MODE CHANGE RESPONSE TIME
A
B
2ms/div
0A
0V
M
B
A
EXITING OFF MODE
M
A: D0 = D1 = 1 2V/div
B: OUTPUT CURRENT, 0.5A/div
V
IN
= 12V, R
LOAD
= 4
20
μ
s/div
______________________________________________________________Pin Desc ription
NAME
FUNCTION
1
LDOL
Internal, Ground-Referenced Low-Dropout Linear Regulator Output.
Bypass with a 0.1μF capacitor in parallel with a 4.7μF capacitor to GND.
2
TOFF
Off-Time Select Input. A resistor (R
TOFF
) connected from this pin 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.
PIN
3, 4
D1, D0
Digital Inputs. Select mode of operation (Table 1).
5
CC
Constant-Current Loop Compensation Input. Bypass with a 0.01μF capacitor to GND.
8
TERM
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.
7
SET
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 3.
6
REF
Reference Voltage Output (V
REF
= 2V). Bypass with a 0.1μF capacitor to GND.
13
NDRV
Gate Drive for an optional N-channel FET synchronous rectifier
12
PGND
High-Current Ground Return for the output drivers
11
CS+
Positive Current-Sense Comparator Input
10
CS-
Negative Current-Sense Comparator Input
9
GND
Ground
14
PDRV
Gate Drive for the P-channel FET
15
LDOH
Internal, Input-Referenced Low-Dropout Linear Regulator Output.
Bypass with a 0.33μF capacitor to IN.
16
IN
Power-Supply Input. Input of the internal, low-dropout linear regulators.
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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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