Texas Instruments SLTS226A Data Handbook
Summary
The PTB78520W is an advanced, isolated DC/DC converter module engineered for robust power management in complex systems. It delivers up to 20A with a wide 18–60V input range and utilizes Auto-Track™ sequencing and Smart-Sense sensing to regulate multiple downstream rails simultaneously. This module is ideal for engineers designing high-performance architectures, especially those in telecommunications or computational environments, requiring precise, sequenced power-up capabilities and compliance with stringent industry standards. The accompanying guide details technical specifications, pin functions, and integration best practices.
Page 1 Text Content
查询PTB48600A供应商 PTB78520W 20-A, 18–60-V Input Auto-Track
SLTS226A – JULY 2004 – REVISED OCTOBER 2005
Compatible Isolated DC/DC Converter
Features Wide-Input Voltage Range: Auto-Track Compatible 18 V to 60 V Sequenced Output 20 A Total Output Current Smart-Sense Remote Sensing 90% Efficiency Under-voltage Lockout Wide-Adjust Output Voltage: Industry Standard Footprint 1.8 V to 3.6 V Surface Mountable
Over-Current Protection 1500 VDC Isolation Output Over-Voltage Protection Agency Approvals (Pending): Over-Temperature Shutdown UL/c UL 60950, EN 60950
Output Enable Control
Description Pin-Out Information
The PTB78520W is a 20-A rated, nation of input-output isolation and a
Pin Function
wide-input (18-60 V) isolated DC/DC wide-input voltage range, allows operation
converter that incorporates Auto-Track™ from either +24 V or –48 V. The wide-
VO Enable *
power-up sequencing. This allows these output adjust enables the output voltage –VIN modules to simultaneously power up with to be set to to any voltage over the range, Track
1.8 V to 3.6 V, using a single external VO Com
any other downstream non-isolated, Auto-
resistor. Precise output voltage regula- (–) Sense
Track compliant module.
Vo Adjust
The PTB78520W module provides tion is assured using Smart-Sense. This
(+) Sense
two outputs, each regulated to the same is a differential remote sense that will
VO Bus
voltage. During power up, the voltage at intelligently regulate the sequenced out-
VO Seq
‘VO Bus’ rises first, allowing this output put, depending on its sequence status.
Other operational features include an Shaded functions indicate signals
to provide input power to any downstream
electrically common with the input.
non-isolated module. The voltage from input under-voltage lockout (UVLO) and
Denotes negative logic:
‘VO Seq’ is then allowed to rise simulta- an output enable control. Over-current,
Low (–VIN) = Normal operation
neously, under the control of Auto-Track, over-voltage, and over-temperature pro-
Open = Output off
along with the outputs from the down- tection assures the module’s ability to stream modules. survive any load fault. Whether used to facilitate power-up Typical applications include distributed sequencing, or operated as a stand-alone power architectures in both telecom and module, the PTB78520W includes many computing environments, particularly
Auto-Track™
features expected of high-performance complex digital systems requiring power-
Sequencing
DC/DC converter modules. The combi- sequencing of multiple power supply rails.
Typical Application
Simultaneous Powerup
Track V2
PTB78520W
+Sense
+VI VO Seq
VO Bus
Track
VO Enable VO Adjust
VI PTH03050W VO
VO COM
GNDInhibit Adjust
100 µF 100 µFR1
–VI –Sense
For technical support and further information visit http://power.ti.com
Page Summary Contents For Texas Instruments SLTS226A Data Handbook
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 15 |
| File Size | 437.72 KB |
| Published | June 21, 2026 |
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