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UC1525B-SP

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航天级 QMLV、35V、双 0.4A 400kHz PWM 控制器

产品详情

Topology Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Voltage Duty cycle (max) (%) 49 Switching frequency (max) (kHz) 400 Features Error amplifier, SYNC Pin, Soft start UVLO thresholds on/off (V) 7/6.8 Operating temperature range (°C) -55 to 125 Rating Space Gate drive (typ) (A) 0.4 Radiation, SEL (MeV·cm2/mg) Bipolar
Topology Flyback, Forward, Full bridge, Half bridge, Push pull Control mode Voltage Duty cycle (max) (%) 49 Switching frequency (max) (kHz) 400 Features Error amplifier, SYNC Pin, Soft start UVLO thresholds on/off (V) 7/6.8 Operating temperature range (°C) -55 to 125 Rating Space Gate drive (typ) (A) 0.4 Radiation, SEL (MeV·cm2/mg) Bipolar
CDIP (J) 16 135.3552 mm² 19.56 x 6.92 LCCC (FK) 20 79.0321 mm² 8.89 x 8.89
  • QML-V Qualified, SMD 5962-89511
  • Rad-Tolerant: 30 kRad (Si) TID(1)
  • 8-V to 35-V Operation
  • 5.1-V Buried Zener Reference Trimmed to ±0.75%
  • 100-Hz to 400-kHz Oscillator Range
  • Separate Oscillator Sync Terminal
  • Adjustable Deadtime Control
  • Internal Soft Start
  • Pulse-by-Pulse Shutdown
  • Input Undervoltage Lockout With Hysteresis
  • Latching PWM to Prevent Multiple Pulses
  • Dual Source/Sink Output Drivers
  • Low Cross Conduction Output Stage
  • Tighter Reference Specifications

(1) Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad/sec. Radiation Lot Acceptance Testing is available - contact factory for details.

  • QML-V Qualified, SMD 5962-89511
  • Rad-Tolerant: 30 kRad (Si) TID(1)
  • 8-V to 35-V Operation
  • 5.1-V Buried Zener Reference Trimmed to ±0.75%
  • 100-Hz to 400-kHz Oscillator Range
  • Separate Oscillator Sync Terminal
  • Adjustable Deadtime Control
  • Internal Soft Start
  • Pulse-by-Pulse Shutdown
  • Input Undervoltage Lockout With Hysteresis
  • Latching PWM to Prevent Multiple Pulses
  • Dual Source/Sink Output Drivers
  • Low Cross Conduction Output Stage
  • Tighter Reference Specifications

(1) Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad/sec. Radiation Lot Acceptance Testing is available - contact factory for details.

The UC1525B pulse width modulator integrated circuit is designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip 5.1-V buried zener reference is trimmed to ±0.75%, and the input common-mode range of the error amplifier includes the reference voltage, eliminating external resistors. A sync input to the oscillator allows multiple units to be slaved or a single unit to be synchronized to an external system clock. A single resistor between the CT and the discharge terminals provide a wide range of dead-time adjustment. These devices also feature built-in soft-start circuitry with only an external timing capacitor required. A shutdown terminal controls both the soft-start circuitry and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown, as well as soft-start recycle with longer shutdown commands. These functions are also controlled by an undervoltage lockout which keeps the outputs off and the soft-start capacitor discharged for sub-normal input voltages. This lockout circuitry includes approximately 500 mV of hysteresis for jitter-free operation. Another feature of these PWM circuits is a latch following the comparator. Once a PWM pulse has been terminated for any reason, the outputs remain off for the duration of the period. The latch is reset with each clock pulse. The output stages are totem-pole designs capable of sourcing or sinking in excess of 200 mA. The UC1525B output stage features NOR logic, giving a LOW output for an OFF state.

The UC1525B pulse width modulator integrated circuit is designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip 5.1-V buried zener reference is trimmed to ±0.75%, and the input common-mode range of the error amplifier includes the reference voltage, eliminating external resistors. A sync input to the oscillator allows multiple units to be slaved or a single unit to be synchronized to an external system clock. A single resistor between the CT and the discharge terminals provide a wide range of dead-time adjustment. These devices also feature built-in soft-start circuitry with only an external timing capacitor required. A shutdown terminal controls both the soft-start circuitry and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown, as well as soft-start recycle with longer shutdown commands. These functions are also controlled by an undervoltage lockout which keeps the outputs off and the soft-start capacitor discharged for sub-normal input voltages. This lockout circuitry includes approximately 500 mV of hysteresis for jitter-free operation. Another feature of these PWM circuits is a latch following the comparator. Once a PWM pulse has been terminated for any reason, the outputs remain off for the duration of the period. The latch is reset with each clock pulse. The output stages are totem-pole designs capable of sourcing or sinking in excess of 200 mA. The UC1525B output stage features NOR logic, giving a LOW output for an OFF state.

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类型 标题 下载最新的英语版本 日期
* 数据表 Regulating Pulse Width Modulators 数据表 2009年 1月 16日
* SMD UC1525B-SP SMD 5962-89511 2016年 7月 8日
* 辐射与可靠性报告 UC1525B-SP Radiation Test Report 2015年 5月 8日
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设计和开发

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封装 引脚 下载
CDIP (J) 16 查看选项
LCCC (FK) 20 查看选项

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

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