TL3845 - 电流模式 PWM 控制器

TL3845是TI德州仪器公司的一款PWM与谐振控制器产品，TL3845是电流模式 PWM 控制器，本站介绍了TL3845的封装应用图解、特点和优点、功能等，并给出了与TL3845相关的TI元器件型号供参考。

TL3845 - 电流模式 PWM 控制器 - PWM与谐振控制器 - 离线隔离型DC/DC控制器和转换器 - 德州仪器

产品特性

Optimized for Off-Line and DC-to-DC Converters
Low Start-Up Current (< 1 mA)
Automatic Feed-forward compensation
Pulse-by-Pulse Current Limiting
Enhanced Load-Response Characteristics
Undervoltage Lockout With Hysteresis
Double-Pulse Suppression
High-Current Totem-Pole Output
Internally Trimmed Bandgap Reference
500-kHz Operation
Error Amplifier With Low Output Resistance
Designed to be Interchangeable with UC2842 and UC3842 Series

产品应用

Switching regulators of any polarity
Transformer-coupled DC/DC convertors

产品说明

The TL284x and TL384x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. Some of the internally implemented circuits are an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator (that also provides current-limit control), and a totem-pole output stage designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.

产品器件信息

PART NUMBER	PACKAGE (PIN)	BODY SIZE (NOM)
TLx84x	SOIC (8)	4.90 mm × 3.91 mm
	SOIC (14)	8.65 mm × 3.91 mm
	PDIP (8)	9.81 mm × 6.35 mm

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