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PT4499--48V
30 Amp "Current Booster" for PT4482 DC/DC Converter
SLTS066A
(Revised 6/30/2000)
* 30A Current Boost (Boosts PT4482 to 60A) * Tracks Vout of PT4482 * Synchronized Operation * High Efficiency * Input Voltage: 36V to 75V * 26-pin Copper Case Package
The PT4499 is a new high-performance 30A "Current Booster" for use with the PT4482 ExcaliburTM DC/DC converter. The PT4499 adds a parallel output stage to the PT4482, allowing both to operate in perfect sychronization. The PT4499 only operates with a PT4482 and is not a stand-alone product. Refer the PT4482 data sheet for the performance specifications. The PT4499 is housed in the same 26-pin case and has the package options as the PT4482.
Patent pending on package assembly
PT Series Suffix (PT1234X)
Case/Pin Configuration Vertical Through-Hole N Horizontal Through-Hole A Horizontal Surface Mount C
Pin-Out Information
Pin Function
1 2 3 4 5 6 7 8 9 +Vin -Vin N/C Vr Va N/C N/C +Vout +Vout
Pin
10 11 12 13 14 15 16 17 18
Function
+V out +V out +V out +V out -V out -V out -V out -V out -V out
Pin Function
19 20 21 22 23 24 25 26 -Vout -V sense N/C N/C N/C N/C N/C DRV
Ordering Information PT4499 t
(For dimensions and PC Board layout, see Package Styles 1200, 1210 and 1215.)
Standard Application
PROGRAMMING PINS
VID0 VID1 VID2 VID3 VID4 REMOTE SENSE (+)
25 24 23 22 21 7
+VIN
1
PT4482
2 3 4 5 26 20
8 - 13
+VOUT
CIN Inhibit -VIN
+
14-19
LOAD
-VOUT
REMOTE SENSE (-)
4 5 26
20
1
PT4499
2
8 - 13
CIN
+
14 - 19
COUT
+
Input Capacitors: Although not necessary for stable operation, Cin will reduce input ripple. Cin = 33F is suggested. Output Capacitors: A minimum of 330F per PT4499 booster module is required for proper operation. Increasing Cout will reduce transients due to large and/or fast load steps.
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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Copyright (c) 2000, Texas Instruments Incorporated

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