PTB48500A Datasheet, PDF (1/17 Pages) Texas Instruments – DUAL-OUTPUT, 48-V INPUT ISOLATED DC/DC CONVERTER for xDSL

PTB48500A and PTB48502A are Not Recommended for New Designs
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PTB48500
PTB48501
PTB48502
SLTS218C – SEPTEMBER 2003 – REVISED AUGUST 2006
DUAL-OUTPUT, 48-V INPUT ISOLATED DC/DC CONVERTER for xDSL
FEATURES
• Dual Outputs (Independently Regulated)
• Input Voltage Range: 36 V to 75 V
• Power-Up/Down Sequencing
• 1500 VDC Isolation
• Over-Current Protection
• Over-Temperature Shutdown
• Under-Voltage Lockout
• Fixed Frequency Operation
• Temp Range: –40°C to 85°C
• Industry Standard Outline
• Operates with PTB4851x for Complete AC7
Power Solution
• Powers up to 64 DSL Ports
• Safety Approvals:
– UL/cUL 60950
– EN 60950
DESCRIPTION
The PTB4850x power modules are a dual-output
isolated DC/DC converter, designed to provide the
logic supply voltages for AC-7 based xDSL
applications. The PTB48500 is rated for 13 A of total
output current, making it suitable for 32-channel
xDSL applications. The PTB48501 and PTB48502
provide output current for powering up to 64 xDSL
channels. The PTB48501 is rated for 16.5 A total
output current, and the PTB48502, 21 A. The
PTB48502 incorporates 10 W of additional capacity
for powering peripheral circuitry. Any of these
converters can be used for other applications with
similar power requirements.
The modules operate from a standard telecom
(–48 V) central office (CO) supply and include an
on/off enable control, output current limit,
over-temperature protection, input under-voltage
lockout (UVLO). The PTB48500 and PTB48501 also
incorporates a power-up reset (POR) output.
The modules are designed to operate with one of the
PTB4851x DC/DC converter modules. The
combination of PTB4850x and PTB4851x converter
provides the complete the power supply for an AC7
chipset. The EN Out and Sync Out pins provide
compatible output signals for controlling both the
power up sequence and switching frequency the
PTB48510.
The PTB4850x modules employ double-sided
surface mount construction, and are an industry
standard size.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2003–2006, Texas Instruments Incorporated