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PSB2120 Datasheet

  • PSB2120

  • ISDN Remote Power Controller

  • 20頁

  • INFINEON   INFINEON

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ISDN Remote Power Controller
(IRPC)
PSB 2120
CMOS IC
Features
q
Switched mode DC/DC-converter
q
Switched mode DC/DC-converter
q
CCITT (I.430) ISDN compatible
q
Integrated 200 V power FET
(only PSB 2120-P in P-DIP-22)
q
Low power dissipation
q
Supply voltage range 10 V to 60 V
q
Input undervoltage detection
q
Programmable overcurrent protection
q
Soft start
q
Control circuit to achieve minimum start-up current
q
Power housekeeping input
q
Oscillator synchronization input/output
q
Polarity reversal detection
q
High voltage CMOS-technology 60 V
P-DSO-24-1
P-DIP-22
Type
PSB 2120-P
PSB 2120-T
Version
V B5
V B5
Ordering Code
Q67100-H8645
Q67100-H6278
Package
P-DIP-22
P-DSO-24-1 (SMD)
The PSB 2120 is a Pulse Width Modulator (PWM) circuit designed for fixed-frequency switching
regulators especially for telephony and ISDN-environments.
The PSB 2120 is fully compatible with the CCITT-power recommendations on the 鈥淪鈥?interface.
Coupled with a few external components it can provide a stable 5 V DC-supply for subscriber
terminals (TE鈥檚) or network terminators (NT鈥檚). It can also be programmed for higher output
voltages, e.g. to supply the S-lines with 40 V.
In telephony and ISDN-systems a high conversion yield is crucial to maintain functionality in all
supply conditions via 鈥淪鈥? or 鈥淯鈥?interfaces. The PSB 2120 design and technology realizes high
conversion efficiency and low power dissipation.
It should be recognized that the PSB 2120 can also be used in numerous DC/DC-conversion
systems other than ISDN-power supplies.
Semiconductor Group
3
12.92

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