For technical support and more information, see inside back cover or visit www.ti.com/powertrends
Patent pending on package assembly
8.5 Amp “Current Booster” for
PT4486 DC-DC Converter
PT4497—48V
Description
The PT4497 is a high-performance
100W/8.5A “Current Booster” for use with
the PT4486 DC/DC converter. The
PT4497 adds a parallel output stage to the
PT4486, allowing both to operate in
perfect sychronization.
The PT4497 only operates with a
PT4486 and is not a stand-alone product.
Refer the PT4486 data sheet for the perfor-
mance specifications. The PT4497 is housed
in the same 26-pin case and has the same
package options as the PT4486.
Ordering Information
PT4497o
Features
•8.5A Current Boost
(Boosts PT4486 up to 17A)
•Tracks Vout of PT4486
•Synchronized Operation
•High Efficiency
•Input Voltage: 36V to 75V
•26-pin Copper Case Package
Standard Application
(For dimensions and PC Board layout, see
Package Styles 1200, 1210 and 1215.)
Pin-Out Information
Pin Function
1+V
in
2-V
in
3 N/C
4V
r
5V
a
6 N/C
7 N/C
8+V
out
9+V
out
Pin Function
10 +Vout
11 +Vout
12 +Vout
13 +Vout
14 -Vout
15 -Vout
16 -Vout
17 -Vout
18 -Vout
PT4497
PT4486
1
2
8 - 13
-VIN -VOUT
+VOUT
20
7
REMOTE SENSE (+)
REMOTE SENSE (-)
VID0
VID1
VID2
VID3
PROGRAMMING PINS
Inhibit
3
CIN
+
CIN
+COUT
+
LOAD
18 - 13
14 - 19
+VIN
25
VID4
24 23 22 21
14-19
2
4526
204526
PT Series Suffix (PT1234X)
Case/Pin
Configuration
Vertical Through-Hole N
Horizontal Through-Hole A
Horizontal Surface Mount C
Input Capacitors:
Although not necessary for stable operation, Cin will reduce input ripple. Cin = 33µF is suggested.
Output Capacitors:
A minimum of 33µF per PT4497 booster module is required for proper operation. Increasing Cout will reduce transients due to large and/or
fast load steps.
Pin Function
19 -Vout
20 -Vsense
21 N/C
22 N/C
23 N/C
24 N/C
25 N/C
26 DRV
SLTS122
(Revised 1/17/2001)
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