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| 型号： | IR3623MPBF |
| 厂商： | International Rectifier |
| 文件页数： | 9/27页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 32MLPQ |
| 标准包装： | 73 |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 1.2MHz |
| 占空比： | 85% |
| 电源电压： | 8.5 V ~ 14.5 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 包装： | 管件 |
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IR3623MPbF
Circuit Description
THEORY OF OPEARTION
Introduction
The IR3623 is a versatile device for high
performance buck converters. It consists of two
synchronous buck controllers which can be
operated either in two independent outputs mode
or in current share single output mode for high
current applications.
The timing of the IC is provided by an internal
oscillator circuit which generates two-180 o -out-of-
phase clock that can be externally programmed
up to 1200kHz per phase.
The IR3623 when combined with IR’s iPOWIR
power stage modules offers a compact and
efficient solution where integration and power
density are desired.
Under-Voltage Lockout
The under-voltage lockout circuit monitors three
signals (Vcc, Enable and 5V_sns). This ensures
the correct operation of the converter during
power up and power down sequence. The PWM
outputs remain in the off state whenever one of
these signals drop below set thresholds. Normal
operation resumes once these signals rise above
the set values. Figure 3 shows a typical start up
sequence. 11V
5V_sns
IR3623 integrates an internal LDO for powering
the external module without need for an external
supply. For a correct start up sequence the
external module needs to be biased first prior to
the controller IC. The V out3 ramps up as soon as
Vcc is applied but the POR (Power On Ready) is
not enabled until the V out3 reached the 5V
threshold set by 5V_sns pin.
Enable
The enable features another level of flexibility for
start up. The Enable has precise threshold which
is internally monitored by under-voltage lockout
circuit.
It’s threshold can be externally programmed to
desired level by using two external resistors, so
the converter doesn’t start up until the input
voltage is sufficiently high.
12V
12V
8.0V
4.7V
5.2V
Vbus
Vcc
Vout3
V out3 OK
5V_sns
V cc OK
Enable OK (IC's POR)
3V
Enable
SS
Seq
Fig. 3: Normal Start up, Enable threshold is externally set to 11V
www.irf.com
January 28, 2013
9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| IR3623MPBF_1 | 制造商:IRF 制造商全称:International Rectifier 功能描述:HIGH FREQUENCY 2-PHASE, SINGLE OR DUAL OUTPUT SYNCHRONOUS STEP DOWN CONTROLLER WITH OUTPUT TRACKING AND SEQUENCING |
| IR3623MTRPBF | 功能描述:开关变换器、稳压器与控制器 HI FREQ 2-PHASE Single or Dual SYNCH RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| IR3624MPBF | 功能描述:IC REG CTRLR BUCK PWM VM 10-MLPD RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| IR3624MTRPBF | 功能描述:开关变换器、稳压器与控制器 HI FREQ SYNC PWM 600kHz 5 or 12V 0.6 RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| IR3628MPBF | 功能描述:IC CTLR PWM BUCK SYNC 12-MLPD RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
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