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Part: PT4475
Category:
Power Management
-> DC-DC Converters
-> Isolated DC-DC Converters
Description:
Company: Texas Instruments, Inc.
Datasheet: Download PT4475 datasheet File size : 157 kB
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Datasheet text preview:
PT4475--24V
100-W 8.5-A Programmable Isolated DC/DC Converter
SLTS128A
(Revised 9/4/2001)
Features
· · · · · · · · · · · · 18V to 36V Input Range -40° to +100°C Operating Temp 1500 VDC Isolation 88.5% Efficiency Programmable Output Voltage 6.5V to 17.5V Remote On/Off Differential Remote Sense N+1 Current Sharing Over-Current Protection Over-Temperature Protection Over-Voltage Protection Solderable Copper Case
Description
The PT4475 ExcaliburTM module combines state-of-the-art power conversion technology with unparalleled flexibility. Operating off a standard 24V telecom input, the PT4475 provides a full 100W output at load currents up to 8.5A, and over the programmable output voltage range of 6.5V to 17.5V. The PT4475 features high efficiency, ultra-fast transient response, and the capability for true N+1 current sharing. This product also includes output short circuit and over-temperature protection.
Standard Application
+ VIN
1 2 C2 + V in V in Inhibit 3 7 + V sns + V out 8 - 1 3
+ VO U T
L O A D
· C1 = Optional 33µF, 100V electrolytic capacitor · C2 = Optional 1µF, 100V ceramic capacitor · Programming pins, VID0VID4, are shown configured for Vo =12.0V · For normal operation, pin 3 (Inhibit) must be connected to Vin. · For operation in N+1 configuration, consult the related application note. · Pins 6 & 26 are used for N+1 configurations only.
PT4475
V I D 0 - VID4 21 22 23 24 25 - V sns
+ C1
- V out 1 4 - 1 9 20
VOUT
V IN
PROGRAMMING PINS
Specifications
Characteristics (Ta=25°C unless noted) Output Current Current Limit Current Sharing Input Voltage Range Output Voltage Tolerance Line Regulation Load Regulation Vo Ripple/Noise Transient Response Vi n Vo R e gl i n e Regload Vn ttr Symbols Io Icl Conditions (Vin= 24V, Vo=12.0V unless noted) Over Vin range (100W max) Vin = 18V Single line referenced to Vsense Io = 0 to Iomax Over Vin range, I o =Io max Ta =-40 to +100°C case Over Vin range @ max Io 0 to 100% of Io max Io =Io max 50% to 75% Iomax @ 0.1A/µs Vo over/undershoot (no ext caps) 50% to 100% Iomax @1.0A/µs Vo over/undershoot (no ext. caps) Vo Rise Time Efficiency Switching Frequency Remote On/Off Over-Voltage Protection Isolation Operating Temperature Range Over-Temperature Shutdown Storage T mperature e Reliability Mechanical Shock Mechanical Vibration (Mil-STD-883D, 20-2000Hz) Weight Votr o Off On OVP -- Tc OTP Ts MTBF -- -- -- At turn-on Io =5A -- referenced to -Vin Shutdown and latch off -- Measured at center of case Case temperature - Auto reset -- Per Bellcore TR-332 50% stress, t =40°C, ground benign Per Mil-STD-883D, Method 2002.3, 1mS, Half-sine, mounted to a fixture Vertical (Suffix N) Horizontal (Suffixes A, C) --
PT4475
Min 0.1 -- -- 18 -- -- -- -- -- -- -- -- -- -- -- +2.5 -0.5 -- 1500 40 -- -40 1.7 -- -- -- Typ -- 10 -- 24 ±1.0 ±0.1 ±0.5 120 N/A 1.0 200 5 -- 89 300 -- -- 125 -- -- +110 -- -- 500 10 20 90
(2) (2)
Max 8.5 -- ±10 36 ±2.0 ±1.0 ±1.0 150 -- -- -- -- 10 -- -- +75.0 +0.8 -- -- +100 -- +125 -- -- -- --
(1)
Units A A % V %Vo %Vo %Vo mVpp µSec %Vo µSec %Vo mSec % kHz VDC %Vo VDC °C °C °C 10 Hrs G's G's grams
6
Notes: (1) The maximum output current is limited to 8.5A or 100/VOUT, Whichever is less. (2) Only the case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable package outline drawing.
For technical support and more information, see inside back cover or visit www.ti.com
PT4475--24V
100-W 8.5-A Programmable Isolated DC/DC Converter
Pin-Out Information
Pin
1 2 3 4 5 6 7 8 9 10 11 12 13
Programming Information
Pin
14 15 16 17 18 19 20 21 22 23 24 25 26
Ordering Information
PT4475H =+6.5V to 17.5V
6.5 6.75 7.0 7.25 7.5 7.75 8.0 8.25 8.5 8.75 9.0 9.25 9.5 9.75 10.0 10.25
Function
+V i n -V i n Inhibit Do not connect Do not connect Sync +V s e n s e +V o u t +V o u t +V o u t +V o u t +V o u t +V o u t
Function
- Vo u t - Vo u t - Vo u t - Vo u t - Vo u t - Vo u t -V s e n s e VID0 VID1 VID2 VID3 VID4 Share
VID3 VID2 VID1 VID0
1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
VID4=1 VID4=0 Vout Vout
10.0 10.5 11.0 11.5 12.0 12.5 13.0 13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5
PT Series Suffix (PT1234 x )
Case/Pin Configuration Vertical Horizontal SMD Order Suf fi x Package Code (EKD) (EKA) (EKC)
N A C
(Reference the applicable package code drawing for the dimensions and PC board layout)
Logic 0 = Pin 20 potential (remote sense gnd) Logic 1 = Open circuit (no pull-up resistors) VID4 may not be changed while the unit is operating.
TYPICAL PT4475, Vo =12.0V
Efficiency vs Output Current
95 90 85
CHARACTERISTICS PT4475, Vo =15.0V
Efficiency vs Output Current
95 90
(See Note A)
(See Note A)
Efficiency - %
Efficiency - %
VIN 18.0V 24.0V 30.0V 36.0V
85 80 75 70 65 60
VIN 18.0V 24.0V 30.0V 36.0V
80 75 70 65 60 0 1 2 3 4 5 6 7 8
0
1
2
3
4
5
6
7
8
Iout (A)
Iout (A)
Power Dissipation vs Output Current
18 16 14 12 14 12
Power Dissipation vs Output Current
VIN Pd - Watts 36.0V 30.0V 24.0V 18.0V
10 8 6 4
VIN 36.0V 30.0V 24.0V 18.0V
Pd - Watts
10 8 6 4 2 0 0 1 2 3 4 5 6 7 8
2 0 0 1 2 3 4 5 6 7 8
Iout (A)
Iout (A)
Safe Operating Area, Vo =12V
90.0 80.0
(See Note B)
Safe Operating Area, Vo =15V
90.0 80.0
(See Note B)
Ambient Temperature (°C)
Ambient Temperature (°C)
Airflow
70.0 60.0 50.0 40.0 30.0 20.0
70.0 60.0 50.0 40.0 30.0 20.0 0. 0 2. 0 4. 0 6. 0 8. 0
Nat conv 100LFM 200LFM 300LFM 400LFM 500LFM
500LFM 400LFM 300LFM 200LFM 100LFM Nat conv
0. 0
1. 0
2. 0
3. 0
4. 0
5. 0
6. 0
7. 0
Iout (A)
Iout (A)
Note A: All data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the DC/DC Converter. Note B: SOA curves represent operating conditions at which the temperature of the metal case is at or below the maximum specified 100°C
For technical support and more information, see inside back cover or visit www.ti.com
Package Code EKD
Suffix N
(Revised 6/30/2000)
PACKAGE INFORMATION AND DIMENSIONS
For technical support and more information, see inside back cover or visit www.ti.com/powertrends
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