MFG:ASTEC Package Cooled:99+ D/C:100
MFG: ASTEC
Package Cooled: 99+
D/C: 100
Description: The AS2208 is a simplified pulse width modulation control-ler, offering similar functionality as that of the AS3842....
The AS2208 is a simplified pulse width modulation control-ler, offering similar functionality as that of the AS3842.Based on the AS2214, the AS2208 provides the additional features of low startup current and overvoltage latching,making it a good solution for adapter applications.
The PWM function is controlled by the current sense com-parator for normal current mode control. The COMP pin,which serves as an input to the current sense comparator,provides a 1 mA current source which can be tied directly to the control loop optocoupler. The output stage is a high current totem pole output that sees only 85 ns delay from the PWM comparator.
The AS2208 requires only 100 A of startup current. The undervoltage lockout (UVLO)thresholds are nominally 14V for turn on and 8 V for turn off. The VREG pin, based on a trimmed bandgap reference, provides a temperature com-pensated 5 V to loads of up to 50 mA. The oscillator discharge current is trimmed to provide guaranteed duty cycle clamping.
| Parameter | Symbol | Rating | Unit |
| Supply Voltage (ICC < 30 mA) | VCC | Self-Limiting | V |
| Supply Voltage (Low Impedance Source) | VCC | 20 | V |
| Reference Current | IREF | 200 | mA |
| Output Current | IOUT | 1 | A |
| Output Voltage | VOUT | 20 | V |
| Continuous Power Dissipation at 25° C | PD | 500 | mW |
| Junction Temperature | TJ | 150 | °C |
| Storage Temperature Range | TSTG | 65 to 150 | °C |
| Lead Temperature, Soldering 10 Seconds | TL | 300 | °C |
AS2208
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