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Details, datasheet, quote on part number:PT4476
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Datasheet text preview:
PT4476--24V
100-W 8.5-A Programmable Isolated DC/DC Converter
SLTS129B
(Revised 6/21/2002)
Features
· 18V to 36V Input Voltage Range · Programmable Output Voltage Range: 6.5V to 17.5V · -40° to +85°C Ambient · 1500 VDC Isolation · 89% Efficiency · On/Off Inhibit · Differential Remote Sense · 17A Output with PT4493 · · · · · · Over-Current Protection Over-Temperature Protection Over-Voltage Protection Space-Saving Package Solderable Copper Case Safety Approvals: UL 60950 CSA 22.2 950 VDE EN60950 Pending
Description
T h e PT4476 ExcaliburTM DC/DC converter module combines state-of-theart power conversion technology with un-paralleled flexibility. Incorporating high efficiency and ultra-fast transient response, these modules provide up to 8.5A of output current over the programmable voltage range of 6.5V to 17.5V. The modules include a number of i n b u i l t features to facilitate system integration. These include a foldback output current limit, over-temperature protection, and an inhibit on/off control. A differential remote sense is also provided to compensate for voltage drop between the converter and load. For additional output current, one PT4476 may be operated with up to two P T 4 4 9 3 compatible booster modules. Each PT4493 adds an additional 8.5A of output current capability.
Ordering Information
PT4476o = 6.5 to 17.5 Volts PT4493o = 8.5-A Booster
Pin-Out Information
Pin
1 2
Function
+Vin Vin Inhibit Vr Va Do not connect (+)Remote Sense +Vout +Vout
Pin
14 15 16 17 18 19 20 21 22 23 24 25 26
Function
Vout Vout Vout Vout Vout Vout ()Remote Sense VID0 VID1 VID2 VID3 VID4 DRV
PT Series Suffix (PT1234 x )
Case/Pin Configuration Vertical Horizontal SMD Order Suffix Package Code * (EKD) (EKA) (EKC)
3 4 5 6 7 8 9
N A C
* Previously known as package styles 1200, 1210, and 1215. (Reference the applicable package code drawing for the dimensions and PC board layout)
10 +Vout 11 +Vout 12 +Vout 13 +Vout
Pins 4, 5, & 26 are used for booster applications. For stand-alone operation, leave open circuit. · Shaded functions indicate those pins that are refer enced to primary-side potential.
Standard Application
+ V IN
1 + V in
7 + V sns + V out 8 - 1 3
+ VOUT
· Co = Optional 33µF electrolytic capacitor
+ Co L O A D
+ C1 C2
2 V in Inhibit 3
PT4476
- V out V I D 0 - VID4 21 22 23 24 25 - V sns 20
14-19
· C1 = Optional 33µF, 50V electrolytic capacitor · C2 = Optional 1µF, 50V ceramic capacitor · Programming pins, VID0VID4, are shown configured for Vo =12V · For normal operation, pin 3 (Inhibit) must be connected to Vin.
V IN
V OUT
PROGRAMMING PINS
For technical support and more information, see inside back cover or visit www.ti.com
PT4476--24V
100-W 8.5-A Programmable Isolated DC/DC Converter
Programming Information
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
PT4470 Series Comparison
VID4=0 Vout
6.50 V 6.75 V 7.00 V 7.25 V 7 .50V 7.75 V 8.00 V 8.2 5V 8.5 0V 8 .75V 9.0 0V 9.2 5V 9.50 V 9.75 V 10.00V 10.25V
VID4=1 Vout
10 .0V 10.5 V 11.0 V 11.5 V 12.0 V 1 2.5V 13.0 V 13.5 V 14.0 V 14.5 V 15.0 V 15.5 V 16.0 V 16.5 V 17.0 V 17.5 V
Functionality PT4471 PT4472 PT4495 PT4473 PT4474 PT4494 PT4475 # PT4476 # PT4493 Regulator Regulator PT4472 Booster Regulator Regulator PT4474 Booster Regulator Regulator PT4476 Booster
Output Voltage Program Range 1.3V 3.5V 1.3V 3.5V N/A 4.6V5.7V 4.6V5.7V N/A 6.5V 17.5V 6.5V17.5V N/A
Configuration for Current Sharing N+1 with other PT4471s With PT4495 boosters Used only with PT4472 N+1 with other PT4473s With PT4494 boosters Used only with PT4474 N+1 with other PT4475s With PT4493 boosters Used only with PT4476
Logic 0 = Connect to ()Remote Sense, pin 20 Logic 1 = Open circuit (no pull-up resistors) VID3 & VID4 must not be changed while the unit is operating.
# This specification covers only the PT4476 regulator and PT4493 current booster.
Specifications
Characteristic
(Unless otherwise stated, Ta =25°C, Vin =24V, Vo =12V, C o =0µF, and Io =Io max) Symbol Io Vin Vo tol Regtemp Regline Regload Votot Vr ttr Vtr Conditions Over Vin range Over Io Range 40° Tcase +100°C, Io =0 Over Vin range Over Io range Includes set-point, line, load, 40° Tcase +100°C Io =5A 20MHz bandwidth 0.1A/µs load step, 50% to 75% Iomax Vo over/undershoot 1A/µs load step, 50% to 100% Iomax Vo over/undershoot Vin =18V, Vo = 1% foldback continuous limit with PT4493 booster Shutdown and latch off Over Vin range Referenced to Vin (pin 2) Min 0 18 -- -- -- -- -- -- -- -- -- -- -- -- -- 270 -- 2.5 0.5 -- -- -- 0 1500 -- 10 -40 -- -40 1.7 -- -- --
PT4476 Typ
-- 24 ±1 ±0.5 ±0.1 ±0.5 ±2 89 120 N/A 1 200 ±5 10 ±10 125 300 17 -- -- 0.2 4 3 -- -- 1100 -- -- 110 -- -- 500 20 (4) 90
Max 8.5 (1) 36 ±1.5 -- ±1 ±1 ±3 -- 150 -- -- -- -- -- -- -- 350 -- Open (2) +0.8 -- 10 -- 10,000 -- -- -- +100 (3) -- +125 -- -- -- --
Units A VDC %Vo %Vo %Vo %Vo %Vo % mVpp µs %Vo µs %Vo A % %Vo kHz V V mA mA µF µF V pF M °C °C °C 106 Hrs G's G's grams
Output Current Input Voltage Range Set Point Voltage T lerance o Temperature Variation Line Regulation Load Regulation Total Output Voltage Variation Efficiency Vo Ripple (pk-pk) Transient Response
Current Limit Current Share T lerance o Over-Voltage Protection Switching Frequency Under-Voltage Lockout Inhibit (Pin 3) Input High Voltage Input Low Voltage Input Low Current Standby Input Current Internal Input Capacitance External Output Capacitance Isolation Voltage Capacitance Resistance Operating T mperature Range e Over-T mperature Shutdown e Storage T mperature e Reliability Mechanical Shock Mechanical Vibration Weight Flammability
Ilim Ishr tol OVP s UVLO VIH VIL IIL Iin standby Cin Cout
pins 3 & 2 connected Between +Vo and Vo Inputoutput/inputcase Input to output Input to output Case temperature, over Vin range Case temperature, auto reset -- Per Bellcore TR-332 50% stress, Ta =40°C, ground benign Per Mil-Std-883D, method 2002.3, 1mS, half-sine, mounted to a fixture Mil-Std-883D, Method 2007.2 Horizontal 20-2000Hz, pcb mounted -- Materials meet UL 94V-0
Tc OTP Ts MTBF -- -- -- --
Notes: (1) The maximum output current is limited to 8.5A or 100/VOUT, whichever is less. (2) The Inhibit (pin 3) has an internal pull-up, which if left open circuit allows the converter to operate when input power is applied. The open-circuit is limited to 6.5V. Refer to the application notes for interface considerations. (3) See Safe Operating Area curves or contact the factory for the appropriate derating. (4) The case pins on through-hole pin configuration (suffix 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
PT4476--24V
100-W 8.5-A Programmable Isolated DC/DC Converter
Typical Characteristics
Performance Characteristics, Vo =12V (See Note A)
Efficiency vs Output Current
95 90 85
Performance Characteristics, Vo =15V
Efficiency vs Output Current
95 90
(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 36.0V 30.0V 24.0V 18.0V Pd - Watts
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, Vin =24V ( See Note B)
90 80
Safe Operating Area, Vo =15V, Vin =24V ( See Note B)
90 80
Ambient Temperature (°C)
Ambient Temperature (°C)
Air flow
70 60 50 40 30 20 0 1 2 3 4 5 6 7 8
Air flow
70 60 50 40 30 20 0 1 2 3 4 5 6
Nat conv 100LFM 200LFM 300LFM 400LFM 500LFM
500LFM 400LFM 300LFM 200LFM 100LFM Nat conv
Iout (A)
Iout (A)
Note A: Characteristic data has been developed from actual products tested at 25°C. This data is considered typical data for the Converter. Note B: SOA curves represent the conditions at which internal components are at or below the manufacturer's maximum operating temperatures
For technical support and more information, see inside back cover or visit www.ti.com
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