PTQB425080 Datasheet, PDF (1/14 Pages) Texas Instruments – 200-W 48-V INPUT, 8-V OUTPUT, SEMI-REGULATED, ISOLATED DC-DC BUS CONVERTER

PTQB425080
www.ti.com
SLTS269A – DECEMBER 2006 – REVISED JANUARY 2007
200-W 48-V INPUT, 8-V OUTPUT, SEMI-REGULATED, ISOLATED DC-DC BUS
CONVERTER
FEATURES
• 200-W Output
• Input Voltage Range: 36 V to 75 V
• Meets 100 V, 100 ms Input Transient
• 6:1 Input-to-Output DC Conversion Ratio:
36 V to 55 V Input
• 10.5 V Output Voltage Limit: > 55 V Input
• 93% Efficiency
• 1500 V_DC Isolation
• On/Off Control
• Overcurrent Protection
• Over-Temperature Shutdown
• Undervoltage Lockout
• SmartSync External Clock Drive (Optional)
• AutoTrack™ Power-Up Sequencing (Optional)
• Standard 1/4-Brick Bus Converter Footprint
• UL Safety Agency Approval (Pending)
DESCRIPTION
The PTQB425080 power module is single-output
isolated DC/DC converter, housed in an industry
standard quarter-brick package. The module is
nominally rated up to 200 W with a maximum load
current of 25 A. It will deliver an output voltage of
1/6^th the input voltage for an input voltage range of
36 V to 55 V, while limiting the output voltage to 10.5
V for an input voltage greater than 55 V.
The PTQB425080 operates from a standard 48-V
telecom central office (CO) supply and occupies only
3.3 in² of PCB area. The module offers OEMs a
compact and flexible high-output power source in an
industry standard footprint. It is suitable for
distributed power applications in both telecom and
computing environments that utilize an intermediate
bus architecture (IBA), and may be used for
powering downstream point-of-load (POL) devices
such as the second generation PTH series of
products (T2).
Features include a remote On/Off control with
optional logic polarity, and an undervoltage lockout
(UVLO). Protection features include output
over-current protection (OCP) and over-temperature
protection (OTP). To compliment T2-POL products,
optional features include a SmartSync compatible
clock drive and a AutoTrack™ power-up sequencing
manager
The module is fully integrated for stand-alone
operation, and require no additional components.
STANDARD APPLICATION
+V_I
1 _+VI
+V_O ⁷
+
(OCp^I tional)
PTQB425080N
−V_I
3 _−VI
−V_O ⁴
Remote On/Off
2
+V_O
+
C_O
(Optional)
Point−of−Load
Power Module
Inputs
−V_O
UDG−06086
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 © 2006–2007, Texas Instruments Incorporated