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AS221, AS221-306, AS2214

Table of contents:
Info of AS221
Info of AS221-306
Info of AS2214

AS221, AS221-306, AS2214 Selling Leads, Datasheet

MFG:SKYWORKS Package Cooled:QFN D/C:08+

AS221, AS221-306, AS2214 Datasheet download

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Part Number: AS221

MFG: SKYWORKS

Package Cooled: QFN

D/C: 08+

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AS2214 General Description

The AS2214 is a full featured, pulse width modulation controller. Based on an improved AS3842, the AS2214 provides additional features that reduce component count and improve specifications in a wide range of power supply designs. The added functionality includes AC power and bulk voltage sensing, over-voltage input, as well as the ability to latch off or bounce through different fault conditions.

The PWM function is controlled by the current sense com-parator for normal current mode control and a second comparator for voltage mode soft start.A buffered RAMP signal is available for slope compensation without loading the oscillator. The output stage is a high current totem pole output that sees only 85 ns delay from the PWM comparator.

The AS2214 requires less than 10A of startup current.The undervoltage lockout (UVLO) thresholds are nominally 13.8V for turn on and 8 V for turn off. A precision 2.5 V bandgap reference serves as an input for the error amplifier.The oscillator discharge current is trimmed to provide guaran-teed duty cycle clamping.

AS2214 Maximum Ratings

Parameter	Symbol	Rating	Unit
Reference Current	I_REF	200	mA
Output Current	I_OUT	1	A
Supply Voltage	V_CC	20	V
Output Voltage	V_OUT	20	V
Continuous Power Dissipation at 25° C	P_D	500	mW
Junction Temperature	T_J	150	°C
Storage Temperature Range	T_STG	65 to 150	°C
Lead Temperature, Soldering 10 Seconds	T_L	300	°C

AS2214 Features

Low Startup Current
Bulk and AC sensing
Soft Start
Single-start or auto-restart modes
Oscillator trimmed for precision duty cycle clamp
Standard temperature range extended to 105°C
Remote on / off control
Buffered Ramp for slope compensation
Standard current mode control

AS2214 Connection Diagram

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