S7KS-25D BEL | Alldatasheet

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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 3 –15V Input / Programmable Output / 25A

  • Compact surface mount package
  • Ultra Wide input range (3 – 15V)
  • 6 bit digital voltage programming (0.7 to 5.4V)
  • 25A of output current
  • Remote sense
  • Remote On/Off
  • Power Good

Description

The S7KS Keystone Series from Bel is a non-isolated step down DC/DC converters providing up to 25A of output current in a compact surface mount package with the capability of paralleling and autophasing to provide up to 200A of output current. This product is designed to operate from any source voltage from 3 to 15V and provide any output voltage from 0.7V to 5.4V with 6-bit digital programming and 50mV resolution. This DC/DC converter requires no external components to operate and provides the ultimate in flexibility. It also greatly simplifies inventory management since a single part can be configured to service a very broad range of applications. Part Selection Output Voltage Input Voltage Max. Output Current On/Off Logic Part Number 0.7 – 5.4V 3 - 15V 25A Active High S7KS-25D1P0 0.7 – 5.4V 3 - 15V 25A Active Low S7KS-25D1PL Input Specifications Parameter Min Typ Max Notes Input Voltage Range 3.0 VDC 15 VDC Input Current (full load) 18A Bias Voltage 4.8 VDC 5.2 VDC Input Current (bias supply) 100mA 200mA Reflected Ripple Current 150mA rms With 100uF, 30mOhm capacitor and 500nH of input inductance. Output Specifications Parameter Min Typ Max Notes Voltage Programmability 0.7V 5.4V Output Current 0A 25A Set Point Accuracy 2% Regulation Line Regulation Load Regulation Temperature 10mV 35mV 40mV Ripple and Noise pk-pk rms 50mV 20mV 0 to 20MHz Bandwidth Full load with external 680uF oscon capacitor on output. Turn on Time 8mS 10mS From Enable Transient Response Deviation Settling Time 150mV 280uS di/dt = 5A/uS Load step =50% of max load. with external 680uF oscon S7KS- 25D (Keystone) PRELIMINARY

  • Analog Trim
  • Single wire current sharing
  • Autophasing

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 3 –15V Input / Programmable Output / 25A Compatible Output Specifications (cont.) Parameter Min Typ Max Notes Remote Sense Compensation ±0.3VDC Output Capacitance TBD uF For applications requiring higher output capacitance please consult factory. General Specifications Parameter Specification Switching Frequency 300kHz typical (fixed) Dimensions inches mm 1.80 x 1.09 x .49 45.7 x 27.7 x 12.4 Weight TBD Operating Temperature -40°C to 85°C Non-Operating Temperature -40°C to 100°C Protection Features Over current Undervoltage 110% to 140% max Io UVLO Vin < 3.0V Remote On/Off Active Low Analog Trim Range +/- 10% Pin Connections Pin Function

1 Vout

2 Vout

3 Vout

5 Trim (analog)

6 Vpp (program/reset)

7 I share

8 CLK

9 Autophase A

10 Autophase B

11 Power Good

12 Vin

13 Vin

14 Vin

15 Gnd

16 Gnd

17 V bias (+5V)

18 On/Off

19 VID5

20 VID4

21 VID3

22 VID2

23 VID1

24 VID0

26 Gnd

27 Gnd

28 Gnd

Voltage Identification (VID) Code VID4 VID3 VID2 VID1 VID0 VID5=0 VID5=1 0 0 0 0 0 0.70 2.30 0 0 0 0 1 0.75 2.40 0 0 0 1 0 0.80 2.50 0 0 0 1 1 0.85 2.60 0 0 1 0 0 0.90 2.70 0 0 1 0 1 0.95 2.80 0 0 1 1 0 1.00 2.90 0 0 1 1 1 1.05 3.00 0 1 0 0 0 1.10 3.10 0 1 0 0 1 1.15 3.20 0 1 0 1 0 1.20 3.30 0 1 0 1 1 1.25 3.40 0 1 1 0 0 1.30 3.50 0 1 1 0 1 1.35 3.60 0 1 1 1 0 1.40 3.70 0 1 1 1 1 1.45 3.80 1 0 0 0 0 1.50 3.90 1 0 0 0 1 1.55 4.00 1 0 0 1 0 1.60 4.10 1 0 0 1 1 1.65 4.20 1 0 1 0 0 1.70 4.30 1 0 1 0 1 1.75 4.40 1 0 1 1 0 1.80 4.50 1 0 1 1 1 1.85 4.60 1 1 0 0 0 1.90 4.70 1 1 0 0 1 1.95 4.80 1 1 0 1 0 2.00 4.90 1 1 0 1 1 2.05 5.00 1 1 1 0 0 2.10 5.10 1 1 1 0 1 2.15 5.20 1 1 1 1 0 2.20 5.30 1 1 1 1 1 2.25 5.40

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 3 –15V Input / Programmable Output / 25A Feature Descriptions Remote Sense These modules employ double-ended remote sense. The +Sense lead should be connected to Vout at the desired point of regulation (typically as close to the load as possible). Similarly, the – Sense lead should be connected to Gnd at the desired point of regulation. If the Sense feature is not being used, these signals should be connected to Vout and Gnd at the module. Voltage Programming The output voltage may be digitally programmed with a 6-bit word to any voltage from 0.7V (000000) to 5.4V (111111). When the most significant bit (MSB) is 0 the resolution is 50mV per step. When the MSB toggles to 1, the resolution becomes 100mV per step. Analog Trim An analog trim pin may be used to margin the output voltage up or down 10% for any give digitally programmed set point. Vpp / Reset This pin is used in the factory to program the embedded micro-controller. Power Good The PwrGood pin is an open drain signal that is pulled low whenever the output voltage is within 10% of its expected voltage. The maximum pull-up voltage for this signal is 7V. Typically it would be pulled high to a 3.3V or 5V rail. Bias Voltage This pin supplies voltage to the micro-controller and to the multi-chip module. If the source voltage is 5V then Vin and Vbias may be tied together. If the source voltage is lower or higher than the 5V requirement for the bias voltage then this pins should be connected to a source capable of supplying at least 200mA. Load Sharing When the outputs and the I share pins of multiple modules are tied together, the units will share the load to within 2A. Auto-Phasing When multiple Keystone modules are used on the same board they may be connected together in a such a way that they operate as a single multiphase unit. Each of the CLK signals should be tied together in a star connection. The A signal of the first unit should be left floating. The B signal of the each unit should be connected to the A signal of the following unit. The B signal of the last unit should be grounded. Regardless of whether or not the units are of the same output voltage and/or whether or not they are load sharing, the units may still be autophased to provide for input ripple current cancellation. Efficiency Vin = 5V 82.0 84.0 86.0 88.0 90.0 92.0 94.0 96.0 98.0 5A 10A 15A 20A 25A 3.3V 1.8V Vin = 12V 80.0 82.0 84.0 86.0 88.0 90.0 92.0 94.0 96.0 5A 10A 15A 20A 25A 3.3V 1.8V

2003 Bel Fuse Inc. Specifications subject to change without notice. 040303 CORPORATE FAR EAST EUROPE Bel Fuse Inc. Bel Fuse Ltd. Bel Fuse Europe Ltd.

206 Van Vorst Street 8F/ 8 Luk Hop Street Preston Technology Management Centre

Jersey City, NJ 07302 San Po Kong Marsh Lane, Suite G7, Preston Tel 201-432-0463 Kowloon, Hong Kong Lancashire, PR1 8UD, U.K. Fax 201-432-9542 Tel 852-2328-5515 Tel 44-1772-556601 www.belfuse.com Fax 852-2352-3706 Fax 44-1772-888366 www.belfuse.com www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 3 –15V Input / Programmable Output / 25A Compatible Product Dimensions Note: This information is for discussion purposes only and product specifications are subject to change without notice. Publication of these specifications does not imply any commitment by Bel to manufacture this or similar products.