SRAH-02A 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 ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A Nonisolated Compact, low profile surface mount package Fixed frequency High efficiency means less power dissipation Excellent thermal performance Optimized for cost Remote on/off Undervoltage lockout (UVLO) Over current and short circuit protection Industrial temperature range
Description
The Bel SRAH-02A and VRAH-02A modules are a series of non-isolated, step down DC/DC power converters that operate from a nominal 12V source. These converters are available in a range of output voltages from 0.9V to 5.0V . They are packaged in a compact, overmolded package rated at 2A. Optional lead forming provides a vertical mount product for minimal footprint or a surface mount option for a very low profile. Standard features include remote on/off, over current and short circuit protection, output voltage adjust and industrial temperature ranges (-40° to +85° C). The output is closely regulated and the efficiency is typically 89% at full load. These products may be used almost anywhere low voltage silicon is employed and a 12V source is available. Typical applications include file servers, routers, line cards and other computing and communications equipment.
Applications
SRAH-02A / VRAH-02A Series Distributed power architectures Data networking equipment Part Number Selection * F indicates fast start up. Telecommunications Computers and peripherals tuptuO egatloV tupnI egatloV tuptuO.xaM tnerruC tuptuO.xaM rewoP lacipyT ycneiciffE rebmuNtraP tnuoMecafruS rebmuNtraP tnuoMlacitreV V0.5V 21A 2W 01% 980 05A20-HARS0 05A20-HARV V0.5V 21A 2W 01% 98* F05A20-HARS* F05A20-HARV V3.3V 21A 2W 6.6% 880 33A20-HARS0 33A20-HARV V5.2V 21A 2W 0.5% 680 52A20-HARS0 52A20-HARV V8.1V 21A 2W 6.3% 280 81A20-HARS0 81A20-HARV V5.1V 21A 2W 0.3% 870 51A20-HARS0 51A20-HARV V2.1V 21A 2W 4.2% 470 21A20-HARS0 21A20-HARV V9.0V 21A 2W 8.1% 070 90A20-HARS0 90A20-HARV V36.3~9.0V 21A 2W 3.7% 070 A1A20-HARS0 A1A20-HARV V36.3~9.0V 21A 2W 3.7% 07* FA1A20-HARS* FA1A20-HARV
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 2 Input Specifications Absolute Maximum Ratings Note: Use beyond the maximum ratings may cause a reliability degradation of the DC/DC converter or may permanently damage the device. Note: 1. Use a 47uF/25V tan capacitor at the input. retemaraP lobmyS niM lacipyT xaM tinU egatloVtupnIsuounitnoCn iV3 .0- 51V egatloVlanimreTelbanEtuptuOn etuoV3 .0- 51V erutarepmeTtneibmAb maT0 4- 58C ° erutarepmeTegarotSr otsT5 5- 521C ° retemaraP eludoM lobmyS niM lacipyT xaM stinU egatloVtupnIgnitarepOl lAn iV8 .01 2.31V tnerruCtupnI V0.5 V3.3 V5.2 V8.1 V5.1 V2.1 V9.0 niI 2.1 58.0 7.0 5.0 54.0 4.0 53.0 A tnerruCtupnIdaoLoN llA 05 Am tnerruCtupnIffOetomeRl lA 30 1 Am tnerruCelppiRdetcelfeRtupnI 1 llA 001 Am smr )P-P(tnerruCelppiRdetcelfeRtupnI 1 llA 003 kpAm I2 tneisnarTtnerruChsurnItl lA 10.02 0.0A 2s dlohserhTegatloVnOnruTl lA 6.9 V dlohserhTegatloVffOnruTl lA8 .8 8.9V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 3 Output Specifications Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated. 1. Vin=12V,lout=half load,Ta=25° C. retemaraP eludoM lobmyS niM lacipyT xaM stinU tnioPteSegatloVtuptuO 1 V0.5 V3.3 V5.2 V8.1 V5.1 V2.1 V9.0 tuoV 9.4 742.3 064.2 177.1 674.1 181.1 688.0 0.5 3.3 5.2 8.1 5.1 2.1 9.0 1.5 353.3 045.2 928.1 425.1 912.1 419.0 V noitalugeRdaoL V0.5 V3.3 V5.2 V8.1 V5.1 V2.1 V9.0 Vm noitalugeReniL V0.5 V3.3 V5.2 V8.1 V5.1 V2.1 V9.0 Vm erutarepmeTrevOnoitalugeR )C°58ot°04-(V 0.5 V3.3 V5.2 V8.1 V5.1 V2.1 V9.0 Vm noitalugeRegatloVtuptuOlatoT )C°58ot°04-(V 0.5 V3.3 V5.2 V8.1 V5.1 V2.1 V9.0 Vm
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A Output Specifications page 4 retemaraP eludoM lobmyS niM lacipyT xaM stinU esioNdnaelppiRtuptuO 2 V0.5 V3.3 V5.2 V8.1 V5.1 V2.1 V9.0 p-pVm esioNdnaelppiRtuptuO 2 V0.5 V3.3 V5.2 V8.1 V5.1 V2.1 V9.0 smrVm egnaRtnerruCtuptuOl lAt uoI0 2A timiLtnerruCCDtuptuOl lAm iltuoI 5.2 6 A egruStiucriCtrohS V0.5 V3.3 V5.2 V8.1 V5.1 V2.1 V9.0 egrustuoI 4.0 4.0 4.0 5.0 5.0 5.0 55.0 8.0 8.0 8.0 0.1 0.1 0.1 1.1 A2s emiTnonruT V36.3-V9.0 V0.5 noT 001 sm emiTnonruT 3 noT 010 2s m nOnruTtatoohsrevOl lA 03 % nOnruTtatoohsrevO 3 V0.5-V5.1 V2.1-V9.0 ecnaticapaCtuptuOl lAt uoC0 01 0001F µ Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated. 2. 0 - 20MHz BW with 100uF tan cap and 1uF ceramic cap. 3. For fast startup modules.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 5 Output Specifications Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated. 3. di/dt=0.1A/uS,T a=25° C with 220uF/10V Tan cap. retemaraP eludoM lobmyS niM lacipyT xaM stinU esnopseRtneisnarT 3 ∆ daoLxaMfo%001ot%05V V0.5 0510 02V m emiTgniltteSs T 0010 41s µ ∆ daoLxaMfo%05ot%001V 0510 02V m emiTgniltteSs T 0010 41s µ esnopseRtneisnarT 3 ∆ daoLxaMfo%001ot%05V V3.3 0210 51V m emiTgniltteSs T 040 6s µ ∆ daoLxaMfo%05ot%001V 0210 51V m emiTgniltteSs T 040 6s µ esnopseRtneisnarT 3 ∆ daoLxaMfo%001ot%05V V5.2 0010 31V m emiTgniltteSs T 040 6s µ ∆ daoLxaMfo%05ot%001V 0010 31V m emiTgniltteSs T 040 6s µ esnopseRtneisnarT 3 ∆ daoLxaMfo%001ot%05V V8.1 090 21V m emiTgniltteSs T 040 6s µ ∆ daoLxaMfo%05ot%001V 090 21V m emiTgniltteSs T 040 6s µ
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 6 Output Specifications Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated. 3. di/dt=0.1A/uS,T a=25° C with 220uF/10V Tan cap. retemaraP eludoM lobmyS niM lacipyT xaM stinU esnopseRtneisnarT 3 ∆ daoLxaMfo%001ot%05V V5.1 080 11V m emiTgniltteSs T 040 6s µ ∆ daoLxaMfo%05ot%001V 080 11V m emiTgniltteSs T 040 6s µ esnopseRtneisnarT 3 ∆ daoLxaMfo%001ot%05V V2.1 070 01V m emiTgniltteSs T 040 6s µ ∆ daoLxaMfo%05ot%001V 070 01V m emiTgniltteSs T 040 6s µ esnopseRtneisnarT 3 ∆ daoLxaMfo%001ot%05V V9.0 060 9V m emiTgniltteSs T 040 6s µ ∆ daoLxaMfo%05ot%001V 060 9V m emiTgniltteSs T 040 6s µ
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 7 Control Specifications General Specifications 1. Efficiency is measured at Vin=12V, full load and Ta=25° C. 2. See graphs on pages 17-25. 3. With remote on/off pin 1 open, unit on. retemaraP eludoM lobmyS niM lacipyT xaM stinU ycneiciffE 1 V0.5 V3.3 V5.2 V8.1 V5.1 V2.1 V9.0 η ycneuqerFgnihctiwS V3.3~V9.0 V0.5 wsF 012 082 052 023 092 063 zHk egnaRmirTegatloVtuptuO )mirTediW( 2 V9.0 304% egnaRmirTegatloVtuptuO )mirTworraN( 2 V0.5 V3.3 V5.2 V8.1 V5.1 V2.1 V9.0 011 011 011 011 011 011 011 thgieWl lA 9.4 g retemaraP eludoM lobmyS niM lacipyT xaM stinU ffO/nOetomeR 3 llAn etuoV V )ffOtinU(woLlangiSl lA3 .0- 1V )nOtinU(hgiHlangiSl lA8 .2 2.31V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 8 Efficiency Data MODULE 5.0V 60% 65% 70% 75% 80% 85% 90% OUTPUT CURRENT EFFICIENCY 10.8 13.2 MODULE 3.3V 55% 60% 65% 70% 75% 80% 85% 90% 95% OUTPUT CURRENT EFFICIENC Y 10.8 13.2 MODULE 2.5V 50% 60% 70% 80% 90% 100% OUTPUT CURRENT EFFICIENCY 10.8 13.2 MODULE 1.8V 50% 55% 60% 65% 70% 75% 80% 85% 90% OUTPUT CURRENT EFFICIENCY 10.8 13.2
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A Efficiency Data page 9 MODULE 1.5V 45% 50% 55% 60% 65% 70% 75% 80% 85% OUTPUT CURRENT EFFICIENCY 10.8 13.2 MODULE 1.2V 45% 55% 65% 75% 85% OUTPUT CURRENT EFFICIENCY 10.8 13.2 MODULE 0.9V 40% 50% 60% 70% 80% OUTPUT CURRENT EFFICIENCY 10.8 13.2
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 10 Ripple and Noise Ripple and noise at full load and 12Vdc input, 2.5Vdc output and Ta=25° C Ripple and noise at full load and 12Vdc input, 1.8Vdc output and Ta=25° C With 100µF tan cap and 1uF ceramic cap at the output. Ripple and noise at full load and 12Vdc input, 3.3Vdc output and Ta=25° C Ripple and noise at full load and 12Vdc input, 5.0Vdc output and Ta=25° C
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A Ripple and Noise Ripple and noise at full load and 12Vdc input, 0.9Vdc output and Ta=25° C Ripple and noise at full load and 12Vdc input, 1.2Vdc output and Ta=25° C page 11 Ripple and noise at full load and 12Vdc input, 1.5Vdc output and Ta=25° C With 100µF tan cap and 1uF ceramic cap at the output.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 12 Transient Response Transient response: di/dt = 0.1A/µS, with 220µF Tan capacitor. Vout=3.3V 50% to 100% load transients at 12V input and Ta=25° C Vout=3.3V 100% to 50% load transients at 12V input and Ta=25° C Vout=5.0V 50% to 100% load transients at 12V input and Ta=25° C Vout=5.0V 100% to 50% load transients at 12V input and Ta=25° C
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 13 Transient Response Vout=1.8V 100% to 50% load transients at 12V input and Ta=25° C Vout=1.8V 50% to 100% load transients at 12V input and Ta=25° C Vout=2.5V 50% to 100% load transients at 12V input and Ta=25° C Vout=2.5V 100% to 50% load transients at 12V input and Ta=25° C Transient response: di/dt = 0.1A/µS, with 220µF Tan capacitor..
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 14 Vout=0.9V 50% to 100% load transients at 12V input and Ta=25° C Vout=0.9V 100% to 50% load transients at 12V input and Ta=25° C Vout=1.2V 50% to 100% load transients at 12V input and Ta=25° C Vout=1.2V 100% to 50% load transients at 12V input and Ta=25° C Transient Response Vout=1.5V 50% to 100% load transients at 12V input and Ta=25° C Vout=1.5V 100% to 50% load transients at 12V input and Ta=25° C Transient response: di/dt = 0.1A/µS, with 220µF Tan capacitor..
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A xRAH-02A1Ax 0.9 ~ 3.3V Thermal Considerations page 15 Vin = 12V xRAH-02A50x
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 16 Output Voltage Set-Point Adjustment xRAH-02A1Ax Trim Resistor Calculation Rtrim up = 3.712 Vo, adj – Vo) Kohm( Adjuste d output voltag e Vo,adj(V) Trim resistor value,Rtrim_up(Kohm) Rt r i mup Vadj_up()
3.630.9 Vadj_up
Note: Output voltage Vo=0.90 3V when trim pin is not connected. V O T rim GND R t R s V t Rt (Kohm) = Rs (4.64Vt - 3.712) 3.712 - Rs(Vout - 0.903)) Kohm( Note: Output voltage Vo=0.90 3V when trim pin is not connected. V O T rim GND R down R up R set Note: Output voltage Vo=0.90 3V when trim pin is not connected. Rset = 3.712 Vout - 0.903 Rup = 3.712 Rset Rset Vm up - 0.903 Rset - 3.712 Rdown = 4.64 Rset Vm down - 3.712 Rset 0.903 Rset + 3.712 - Rset Vm down Vout is desired output voltage. Margin up value after output voltage is set with Rset Margin down value after output volatge is set with Rset Vm down > 90% Vout ( ) Kohm ) Kohm( ) Kohm(
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 17 xRAH-02A090 Trim Resistor Calculation Output Voltage Set-Point Adjustment Vo Tr im Gnd Trim Up Test Circuit 100 200 300 400 500 600 700 800 900 1000 Adjusted output voltage Vo,adj(V) Trim resistor value,Rtrim_up(Kohm) 1000 Rtrimup Vadj_up( ) 0.990.9 Vadj_up KohmVoadjVoupRtrim −= , 712.3_ Vo is the nominal output voltage setpoint when trim pin is open ,Vo=0.903V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. where,
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 18 Output Voltage Set-Point Adjustment xRAH-02A120 Trim Resistor Calculation Vo Tr im Gnd Vo Tr im Gnd Trim Down Test Circuit Trim Up Test Circuit KohmadjVoVodownRtrim −−= 64.4, 87.1_ KohmVoadjVoupRtrim −= , 712.3_ where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.203V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.203V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. 100 Adjusted output voltage Vo,adj (V) Trim resistor value Rtrim_down(Kohm) 116 164 212 260 308 356 404 452 500 Adjusted output voltage Vo,adj(V) Trim resistor value,Rtrim_up(Kohm)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 19 Output Voltage Set-Point Adjustment xRAH-02A150 Trim Resistor Calculation KohmadjVoVodownRtrim −−= 64.4, 2633.3_ KohmVoadjVoupRtrim −= , 712.3_ where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.503V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.503V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. 100 150 200 250 300 350 400 450 500 Adjusted output voltage Vo,adj (V) Trim resistor value Rtrim_down(Kohm) 100 200 300 400 500 600 700 800 900 1000 Adjusted output voltage Vo,adj(V) Trim resistor value,Rtrim_up(Kohm)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 20 Output Voltage Set-Point Adjustment xRAH-02A180 Trim Resistor Calculation KohmadjVoVodownRtrim −−= 64.4, 6538.4_ KohmVoadjVoupRtrim −= , 712.3_ where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.803V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=1.803V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. 100 150 200 250 300 350 400 450 500 Adjusted output voltage Vo,adj (V) Trim resistor value Rtrim_down(Kohm) 100 150 200 250 300 350 400 450 500 Adjusted output voltage Vo,adj(V) Trim resistor value,Rtrim_up(Kohm)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 21 xRAH-02A250 Trim Resistor Calculation Output Voltage Set-Point Adjustment KohmadjVoVodownRtrim −−= 64.4, 9117.7_ KohmVoadjVoupRtrim −= , 712.3_ where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=2.503V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. Vo is the nominal output voltage setpoint when trim pin is open ,Vo=2.503V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. where, 100 150 200 250 300 350 400 450 500 Adjusted output voltage Vo,adj (V) Trim resistor value Rtrim_down(Kohm) 100 150 200 250 300 350 400 450 500 Adjusted output voltage Vo,adj(V) Trim resistor value,Rtrim_up(Kohm)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 22 Output Voltage Set-Point Adjustment xRAH-02A330 Trim Resistor Calculation KohmadjVoVodownRtrim −−= 64.4, 614.11_ KohmVoadjVoupRtrim −= , 712.3_ Vo is the nominal output voltage setpoint when trim pin is open ,Vo=3.303V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. where, where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=3.303V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. 100 150 200 250 300 350 400 450 500 Adjusted output voltage Vo,adj (V) Trim resistor value Rtrim_down(Kohm) 100 150 200 250 300 350 400 450 500 Adjusted output voltage Vo,adj(V) Trim resistor value,Rtrim_up(Kohm)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 23 Output Voltage Set-Point Adjustment xRAH-02A50x Trim Resistor Calculation KohmadjVoVodownRtrim −−= 69.13, 02.26_ KohmVoadjVoupRtrim −−= 5.7, 952.4_ Vo is the nominal output voltage setpoint when trim pin is open ,Vo=5.003V Vo,adj is the adjusted output voltage. Rtrim-down is the resistance required between TRIM and Vo. where, Vo is the nominal output voltage setpoint when trim pin is open ,Vo=5.003V Vo,adj is the adjusted output voltage. Rtrim-up is the resistance required between TRIM and GND. where, 100 150 200 250 300 350 400 450 500 Adjusted output voltage Vo,adj (V) Trim resistor value Rtrim_down(Kohm) 100 150 200 250 300 350 400 450 500 Adjusted output voltage Vo,adj(V) Trim resistor value,Rtrim_up(Kohm)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 24 Mechanical SRAH-02A niP noitcnuF 1f fO/nOetomeR 2n iV+ 3d nuorG 4o V+ 5m irT 6n oitcennoCoN 7n oitcennoCoN 0.400 [10.16] 0.60 [15.24] 0.70 [17.78] 0.137 [3.48] 0.100 [2.54] 4x 0.400 [10.16] 0.012 [0.30] 0.050 ±0.002 [1.27 ±0.05] 0.020 ±0.002 [0.51 ±0.05] 0.320 [8.13] 0.780 [19.81] 0.055 [1.40] 0.090 [2.29] 2 x 4˚ 0.050 [1.27] Dimensions are in inches [millimeters]. Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted. 5 6
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 ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 POWER PRODUCTS NON-ISOLATED DC/DC CONVERTERS BP05xRAH-02A 12V Input / 0.9V – 5.0V Output / 2A page 25 Mechanical VRAH-02A niP noitcnuF 1f fO/nOetomeR 2n iV+ 3d nuorG 4o V+ 5m irT 0.700 [17.78] 0.600 [15.24] 0.050 [1.27] 0.265 [6.73] min 0.020 [0.51] 0.308 [7.82] 0.050 [1.27] 0.100 [2.54] 0.400 [10.16] Dimensions are in inches [millimeters]. Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted. 0.137 [3.47] 2 43 51 RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. These parts are not however compatible with the higher temperatures associated with lead free solder processes and must be soldered using a reflow profile with a peak temperature of no more than 240ºC.