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参数资料
| 型号： | MAX1822EPA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/10页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHED CAP ADJ 8DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | 切换式电容器（充电泵） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 14.5 V ~ 27.5 V |
| 输入电压： | 3.5 V ~ 16.5 V |
| 频率 - 开关： | 90kHz |
| 电流 - 输出： | 25mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 供应商设备封装： | 8-PDIP |
High-Side Power Supply
H-BRIDGE MOTOR CONTROL
+5V
14
1
C1
8
V CC
C3
10 μ F
4
D1
V+
S2
10
IRF541
IRF541
C1
0.047 μ F
7
C1-
V OUT
5
11
D2
S4 13
DC MOTOR
+5V
MAX1822
DG303
+
–
6
C2+
6
IN1
S3
C2
0.047 μ F
2
C2-
GND
9
IN2
GND
D3
S1
D4
5
IRF541
IRF541
4
7
3
12
REVERSE
FORWARD
Figure 4. H-Bridge Motor Controller
internal switches during charge-pump cycles. This may
damage the device.
high-side output current from the MAX1822 at a given
supply voltage, calculated as follows:
Output Protection
The MAX1822 is not internally short-circuit protected. In
applications where the output is susceptible to short
R MIN =
V OUT x (number of channels)
I OUT
R CL ≥
circuit, external output short-circuit protection must be
provided. Accomplish this by connecting a resistor
between V OUT and the load to limit output current to
less than 25mA. The resistor value is determined by the
following formula:
V CC
25 mA
Typical Applications
One MAX1822 Drives
Six High-Side Switches
Multiple subsystems or modules can be turned on and
off using a single MAX1822 and an open-drain hex
buffer such as the 74C906 ( Figure 3). The drains of all
buffer outputs are pulled through resistors to the
MAX1822 ’ s V OUT . The pullup resistance depends on
the number of channels being used with the MAX1822
and power-dissipation limitations. The minimum pullup
resistor value is determined by the number of channels
paralleled on each high-side power supply and the
where V OUT is the high-side output voltage and I OUT is
the output current of the MAX1822.
For example, assuming an output current of 1mA and
six channels, as in Figure 3, the minimum pullup resis-
tor value that will not excessively load the MAX1822 is
about 100k ? , assuming all six channels are pulled low
at the same time. The value of the pullup resistor also
affects the turn-on time of each FET, and hence the
amount of energy dissipated in the FET during turn-on.
The rate of rise of V GS is limited by the RC time con-
stant of the pullup resistor and FET gate capacitance;
waste power will be dissipated in the FET equal to
(I LOAD ) 2 x r DS during the RC time period.
H-Bridge Motor Driver
An H-bridge motor driver is shown in Figure 4. The
motor direction can be controlled by toggling between
IN1 and IN2 of the DG303 analog switch. Each switch
section turns on the appropriate FET pair, which pass-
es current through the motor in the desired direction.
_______________________________________________________________________________________
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1822EPA+ | 功能描述:直流/直流开关调节器 High-Side Power Supply RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1822ESA | 功能描述:直流/直流开关调节器 High-Side Power Supply RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1822ESA+ | 功能描述:直流/直流开关调节器 High-Side Power Supply RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1822ESA+T | 功能描述:直流/直流开关调节器 High-Side Power Supply RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1822ESA-T | 功能描述:直流/直流开关调节器 High-Side Power Supply RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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