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AS998

Features: • Low start-up current 64 A (Typ)• Low running current 2 mA (Typ)• Low power light load mode• Low power standby when OV is activated • Extended commercial operating temperature range: 0 to 105°C• On-board fixed frequency oscillator 100 kHz (Typ)•...

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SeekIC No. : 004288630 Detail

AS998: Features: • Low start-up current 64 A (Typ)• Low running current 2 mA (Typ)• Low power light load mode• Low power standby when OV is activated • Extended commercial ope...

AS998 Data Sheet

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Part Number:
AS998
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/12/22

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Product Details

Description



Features:

• Low start-up current 64 A (Typ)
• Low running current 2 mA (Typ)
• Low power light load mode
• Low power standby when OV is activated
• Extended commercial operating temperature range: 0 to 105°C
• On-board fixed frequency oscillator 100 kHz (Typ)
• Frequency randomizer to reduce EMC emissions
• Dedicated OV shutdown pin
• On-board voltage ramp compensation
• On-board current sensing filtering
• Optional primary side regulation


Pinout

Connection Diagram


Specifications

Rating
Symbol
Rating
Unit
Supply Voltage (Low Impedance Source)
VDD
13
V
Supply Voltage (High Impedance Source)
IDD
45
mA
Output Peak Current
IOUT
600
mA
Regulator Current
IREG
10
mA
Continuous Power at 25            8L SOIC
                                                     8L PDIP
PD
750
1000
mW
mW
Junction Temperature
TJ
150
Storage Temperature
TSTG
-65 to 150
Lead Temperature, Soldering 10 Seconds
TL
300

Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.

 




Description

The AS998/AS998A is an IC intended for use as a PWM controller for switch mode power supplies. The device is particularly suited as a primary side controller for adapter, printer, peripheral, mobile chargers and desktop auxiliary power supplies. The AS998/AS998A is manufactured in BICMOS technology and exhibits very low start-up and operating power. This allows the device to be suitable in applications where stringent standby or Blue Angel criteria are required.

Many of the external functions associated with PWM controllers of  AS998 have been integrated into the AS998/AS998A allowing the external component count to be significantly reduced. Features such as fixed internal oscillator, internal ramp compensation and current filters all reduce the external support components.

The AS998/AS998A has a typical output rise and fall time of 250/210 ns.




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