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参数资料
| 型号： | MC44603DW |
| 厂商： | ON SEMICONDUCTOR |
| 元件分类： | 稳压器 |
| 英文描述： | MIXED FREQUENCY MODE GREENLINE PWM CONTROLLER |
| 中文描述： | 0.75 A SWITCHING CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | PLASTIC, SOP-16 |
| 文件页数： | 18/24页 |
| 文件大小： | 410K |
| 代理商： | MC44603DW |
MC44603A
18
MOTOROLA ANALOG IC DEVICE DATA
Undervoltage Lockout Section
Figure 47. VCC Management
Reference Block:
Voltage and Current
Sources Generator
(Vref, Iref, ...)
VCC
Vref enable
Cstartup
1
0
1
0
Vdisable2
7.5 V
Startup
14.5 V
UVLO1
(to Soft–Start)
Vdisable1
9.0 V
CUVLO1
RF Stby
Rref
Pin 15
Pin 16
1
As depicted in Figure 47, an undervoltage lockout has
been incorporated to garantee that the IC is fully functional
before allowing system operation.
This block particularly, produces Vref (Pin 16 voltage) and
Iref that is determined by the resistor Rref connected between
Pin 16 and the ground:
Vref
Rref
Another resistor is connected to the Reference Block:
RF Stby that is used to fix the standby frequency.
In addition to this, VCC is compared to a second threshold
level that is nearly equal to 9.0 V (Vdisable1). UVLO1 is
generated to reset the maximum duty cycle and soft–start
block disabling the output stage as soon as VCC becomes
lower than Vdisable1. In this way, the circuit is reset and made
ready for the next startup, before the reference block is
disabled (refer to Figure 29). Finally, the upper limit for the
minimum normal operating voltage is 9.4 V (maximum value
of Vdisable1) and so the minimum hysteresis is 4.2 V.
((Vstup–th) min = 13.6 V).
The large hysteresis and the low startup current of the
MC44603A make it ideally suited for off–line converter
applications where efficient bootstrap startup techniques are
required.
Iref
where Vref
2.5 V (typically)
相关PDF资料 |
PDF描述 |
|---|---|
| MC44603P | MIXED FREQUENCY MODE GREENLINE PWM CONTROLLER |
| MC44603AP | RV Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 3.3V; Output Voltage (Vdc): 24V; Power: 2W; High Isolation 2W Converter; Approved for Medical Applications; EN and UL Safety Certificates; 6kVDC Isolation; Skinny DIP24 Package; Optional Continuous Short Circuit Protected; Fully Encapsulated; Very Low Isolation Capacitance |
| MC44603DW | RV Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 3.3V; Output Voltage (Vdc): 24V; Power: 2W; High Isolation 2W Converter; Approved for Medical Applications; EN and UL Safety Certificates; 6kVDC Isolation; Skinny DIP24 Package; Optional Continuous Short Circuit Protected; Fully Encapsulated; Very Low Isolation Capacitance |
| MC44603P | RV Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 3.3V; Output Voltage (Vdc): 3.3V; Power: 2W; High Isolation 2W Converter; Approved for Medical Applications; EN and UL Safety Certificates; 6kVDC Isolation; Skinny DIP24 Package; Optional Continuous Short Circuit Protected; Fully Encapsulated; Very Low Isolation Capacitance |
| MC44604P | HIGH SAFETY STANDBY LADDER MODE GREENLINE PWM CONTROLLER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC44603DWR2 | 功能描述:电流型 PWM 控制器 Voltage/Current PWM 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 |
| MC44603DWR2G | 功能描述:电流型 PWM 控制器 Voltage/Current PWM w/Bust Mode Standby 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 |
| MC44603P | 功能描述:电流型 PWM 控制器 Voltage/Current PWM 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 |
| MC44603PG | 功能描述:电流型 PWM 控制器 Voltage/Current PWM w/Bust Mode Standby 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 |
| MC44604 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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