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NON-ISOLATED DC/DC CONVERTERS
12V Input 0.9V-5.0V/20A Output
x7PF-20A1A0
* * * * * * Non-Isolated Fixed Frequency (275KHz) High Efficiency High Power Density Power Good Output Signal (open collector) Under-Voltage Lockout (UVLO) * * * * * Wide Trim Range Converter Can Sink and Source Current OCP/SCP Remote On/Off Low Cost
Description
The Bel x7PF-20A1A0 is a new high density open frame non-isolated converter series for space sensitive applications. Each model has a wide input range (10.2V-13.8V) and offers a wide range of output voltage (0.9V - 5.0V) with a 20A load. An external resistor adjusts the output voltage from its pre-set value of 0.9V to any value up to the 5.0V maximum. Typical efficiency is 92% at Vo=5V, Vin=12V at full load. Typical features include remote on/off, under-voltage lockout, over-current protection and short circuit protection.
Part Selection
Output Voltage 0.9V - 5.0V Input Voltage 12V Max. Output Current 20A Max. Output Power 100W Typical Efficiency 92% Model Number Vertical Mount V7PF-20A1A0 Model Number Horizontal Mount 07PF-20A1A0
Note: Add "G" suffix at the end of the model number to indicate Tray Packaging.
Absolute Maximum Ratings
Parameter Input Voltage (continuous) Output Enable Terminal Voltage Ambient Temperature Storage Temperature Min -0.3V -0.3V 0C -40C Typ Max 13.8V 13.8V 80C 125C Notes
Input Specifications
Parameter Input Voltage Input Current (Source) Vo=5.0V Vo=2.5V Vo=0.9V Input Current (Sink) Vo=2.5V Vo=0.9V Input Current (No Load) Remote Off Input Current -3.44A -0.97 A 95mA 5mA 10mA Min 10.2V Typ 9.1A 4.9A 2.2A Max 13.8V Able to sink 20A output current at any output voltage up to and including 2.5V. Notes
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12V Input 0.9V-5.0V/20A Output
Input Specifications (continued)
Parameter Input Reflected Ripple Current (pk-pk) Vo=5.0V Vo=3.3V Vo=2.5V Vo=0.9V Input Reflected Ripple Current (RMS) Vo=5.0V Vo=3.3V Vo=2.5V Vo=0.9V External Input Capacitance Turn-on Voltage Threshold Turn-off Voltage Threshold Min 8.5V 7.0V Typ 280mA 250mA 200mA 150mA 80mA 70mA 45mA 40mA 540uF 9.0V 7.6V Max 350mA 320mA 280mA 250mA 120mA 100mA 80mA 60mA 9.5V 8.3V Notes
Tested with simulated source impedance of 1.5uH 5Hz to 20MHz, and 2 x 270uF/16V Oscon capacitors (ESR 20 m) at the input
Note: All specifications are typical at 25C unless otherwise stated.
Output Specifications
Parameter Output Voltage Set Point Output Voltage Set Point Load Regulation Vo=5.0V Vo=3.3V Vo=2.5V Vo=0.9V Line Regulation Output Ripple and Noise (pk-pk) Vo=5.0V Vo=3.3V Vo=2.5V Vo=0.9V Output Ripple and Noise (RMS) Vo=5.0V Vo=3.3V Vo=2.5V Vo=0.9V Output Current Current Limit Threshold Short Circuit Surge Transient Turn on Time Overshoot at Turn on Output Capacitance Vo=5.0V Vo=2.5V Vo=0.9V Transient Response 50% ~ 75% Max Load Settling Time VO=0.9V5.0V 75% ~ 50% Max Load Settling Time 0A 25A 680uF 680uF 680uF 65mV 60mV 55mV 45mV 18mV 15mV 15mV 10mV 5mS 0%Vo 100mV 40uS 100mV 40uS 0.4%Vo,set 0.4%Vo,set 0.5%Vo,set 1%Vo,set 0.5%Vo,set 80mV 75mV 70mV 55mV 25mV 25mV 20mV 15mV 20A 40A 0.1A2s 10mS 3%Vo 5080uF 7840uF 11000uF 150mV 80uS 150mV 80uS Test conditions: di/dt=2.5A/uS; Vin=12V; with a 680uF/6.3V Oscon capacitor (ESR 12m),10uF/16V Tantalum capacitor, and 10nF ceramic capacitor at the output. Io=Iomin to Iomax Min -2.5%Vo,set -3.5%Vo,set Typ Max 2.5%Vo,set 3.5%Vo,set Notes Vin=12V, lo=lomax, full load Over all operating input voltage, resistive load, and temperature conditions
Vin=Vinmin to Vinmax Tested at 0-20MHz BW, with a 680uF/6.3V Oscon capacitor (ESR 12 m), 10uF/16V Tantalum capacitor, and 10nF ceramic capacitor at the output.
Note: All specifications are typical at nominal input, full load at 25C unless otherwise stated.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12V Input 0.9V-5.0V/20A Output
Min 89% 86% 83% 65% 79% 60% 240KHz 0.9V Typ 92% 89% 86% 69% 82% 63% 275KHz 5,570,000 hours 1.2 x 1.1 x 0.457 30.48 x 27.94 x 11.6 1.2 x 1.1 x 0.508 30.48 x 27.94 x 12.91 15g Max 310KHz 5.0V Notes
General Specifications
Parameter Efficiency (Current Source) Vo=5.0V Vo=3.3V Vo=2.5V Vo=0.9V Efficiency (Current Sink) Vo=2.5V Vo=0.9V Switching Frequency Output Voltage Trim Range MTBF Dimensions Inches (L x W x H) Millimeters (L x W x H) Dimensions Inches (L x W x H) Millimeters (L x W x H) Weight
Measured at Vin=12V, full load.
Vo=0.9V when the Trim pin is open. Calculated Per Bell Core TR-332 (IO = Nominal; Ta = 25C)
V7PF-20A1A0 07PF-20A1A0
-
-
Note: All specifications are typical at 25C unless otherwise stated.
Control Specifications
Parameter Remote On/Off Signal Low (Unit Off) Signal High (Unit On) Power Good Power Good Delay
1
Min -0.3V 2.4V -
Typ -
Max 0.8V 13.8V 8mS
Notes Remote On/Off pin open, unit on.
Note: All specifications are typical at 25C unless otherwise stated. 1. the power good signal is an open collector output. When the output of the module reaches 90% of the nominal set point, the power good pin is set high.
Output Trim Equations
Equation for calculating the trim resistor (in k) given the desired adjusted voltage (Vadj) is shown below. The Trim Up resistor should be connected between the Trim pin and Ground. Trim values should not be less than 280.
Rtrim =
1.17 Vadj - 0.9
Vout
Module Trim
GND
Rtrim
Equation for calculating the trim voltage (in V) given the desired adjusted voltage (Vadj) is shown below. The Trim Up voltage should be connected between the Trim pin and Ground.
Vout
Rs x (1.3Vt - 1.17 ) Rt = 1.17 - Rs x (Vadj - 0.9 )
Module
Rt
Trim
Rs
GND
Vt
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12V Input 0.9V-5.0V/20A Output
Efficiency Data
5.0V Vout(SOURCE) 93.0% Efficiency 90.0% 87.0% 84.0% 81.0% 78.0%
2.0 5.0 10.0 15.0 20.0 10.2V 12.0V 13.8V
Output Current (A)
2.5V Vout(SOURCE)
91.0% 88.0% Efficiency 85.0% 82.0% 79.0% 76.0% 73.0% 2.0 5.0 10.0 Output Current (A) 15.0 20.0
10.2V 12.0V 13.8V
0.9V Vout(SOURCE)
85.0% 80.0% 75.0% Efficiency 70.0% 65.0% 60.0% 55.0% 50.0% 2.0 5.0 10.0 Output Current (A) 15.0 20.0
10.2V 12.0V 13.8V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12V Input 0.9V-5.0V/20A Output
Thermal Derating Curves
Vo=5V; Vin=12V
Vo=2.5V; Vin=12V
Vo=0.9V; Vin=12V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12V Input 0.9V-5.0V/20A Output
V7PF-20A1A0
Pin Connections
Pin 1 2 3 4 5 6 7 8 9 10 11 Function Vout Vout Vout Trim Remote On/Off Power Good Ground Ground Reserved Vin Vin
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com
NON-ISOLATED DC/DC CONVERTERS
12V Input 0.9V-5.0V/20A Output
07PF-20A1A0
Pin Connections
Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 Function Vout Vout Vout Trim Remote On/Off Power Good Ground Ground Pwrgd_set Vin Vin Support Pin Support Pin
2005 Bel Fuse Inc. Specifications subject to change without notice. 020405
CORPORATE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
FAR EAST Bel Fuse Ltd. 8F/ 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 www.belfuse.com
EUROPE Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite G7, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com

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