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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 1 non-isolated dc/dc converters 6.5 vdc - 13.2 vdc input, 1.2 vdc - 2.1 vdc output aug. 12, 2010 bel power inc., a subsidiary of bel fuse inc. features ? non-isolated ? over/under voltage protection ? high efficiency ? ocp/scp ? fixed frequency ? 2-wire remote sense ? wide input ? 2 bit vid digital voltage programming ? remote on/off ? open-drain power good output ? imon pin for output current monitoring ? power state indicator(psi#) pin for phase dropping and higher efficiency during light load states ? class 1, category 2, non-isolated dc/dc converter (refer to ipc-9592) applications ? networking ? computers and peripherals ? telecommunications description the vrp3-90exa0 series are non-isolated step down dc/dc converters providing up to 90 a output current. standard features include remote on/off, remote sense, 2 bit vid digital voltage programming, a power good signal, over voltage and under voltage protection, over current protection, current monitor and power state indicator (psi#). this product may be used almost anywhere low-voltage silicon is being employed and a nominal 12v source is available. typical applications include telecommunications, networking and other computing applications. part selection output voltage input voltage max. output current max. output power typical efficiency model number active high 1.21 vdc - 2.1vdc 6.5 vdc - 13.2 vdc 90 a 200 w 85% vrp3-90e1a0 1.2 vdc - 2.1vdc 6.5 vdc - 13.2 vdc 90 a 200 w 85% VRP3-90E2A0 notes: add ?g? suffix at the end of the model number to indicate tray packaging. part number explanation v r p3 ? 90 e 1a 0 1 2 3 4 5 6 7 1---vertical mount 2---rohs 6, change ?r? to ?7? means rohs 5 3---series name, sip 4---series code, output current 90a 5---wide input range (6.5-13.2v) 6---?1a?, ?2a? wide trim range 7---suffix v rp3-90exa0 rohs com p liant rev.g
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 2 non-isolated dc/dc converters 6.5 vdc - 13.2 vdc input, 1.2 vdc - 2.1 vdc output aug. 12, 2010 bel power inc., a subsidiary of bel fuse inc. absolute maximum ratings parameter min typ max unit notes continuous non-operating input voltage -0.3 - 15 v remote on/off -0.3 - 5 v ambient temperature 0 - 70 c storage temperature -55 - 125 c note: ratings used beyond the maximum ratings may caus e a reliability degradation of the converter or may permanently damage the device. input specifications parameter min typ max unit notes operating input voltage 6.5 12 13.2 v input current (full load) - - 35 a input current (no load) - 500 700 ma remote off input current - 10 25 ma input reflected ripple current (rms) - 10 25 ma input reflected ripple current (pk-pk) - 25 50 ma with simulated source impedance of 100nh, 5hz to 20mhz. use 2 * 470uf/16v oscon capacitor. i 2 t inrush current transient - - 1 a 2 s turn-on voltage threshold 5.4 5.7 6.0 v turn-off voltage threshold 4.8 5.1 5.4 v note: all specifications are typical at 25 c unless otherwise stated. output specifications parameter min typ max unit notes output voltage set point vrp3-90e1a0 1.192 1.330 1.478 2.069 1.210 1.350 1.500 2.100 1.228 1.370 1.523 2.132 v v v v - rtrim=7.86k ? rtrim=3.79k ? rtrim=1.24k ? output voltage set point VRP3-90E2A0 1.182 1.478 1.773 2.069 1.20 1.50 1.80 2.10 1.218 1.523 1.827 2.132 v v v v vid1,vid0=00 vid1,vid0=01 vid1,vid0=10 vid1,vid0=11 load regulation - - 12 mv line regulation - 5 10 mv regulation over temperature (0deg.c-70deg.c) - 10 20 mv ripple and noise (pk-pk) - 25 40 mv ripple and noise (rms) - 10 20 mv 20mhz bw, co=3600uf. ripple and noise (pk-pk) under worst case - - 60 mv over all operati ng input voltage, load and temperature conditions. output current range 0 - 90 a output dc current limit 100 - 130 a
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 3 non-isolated dc/dc converters 6.5 vdc - 13.2 vdc input, 1.2 vdc - 2.1 vdc output aug. 12, 2010 bel power inc., a subsidiary of bel fuse inc. output specifications (continued) parameter min typ max unit notes turn on delay time - 3.5 5 ms rise time - 2.5 5 ms overshoot at turn on - - 1 % output capacitance - 3600 - uf transient response overshoot - - 200 mv v50%~100% of max load settling time - - 150 us overshoot - - 200 mv v100%~50% of max load settling time - - 150 us di/dt=2.5a/us, vin=12vdc, ta=25c,co=3600uf note: all specifications are typical at nominal inpu t, full load at 25c unless otherwise stated. general specifications parameter min typ max unit notes efficiency vin =12, vout=1.5v,iout=90a 82 85 - % vrp3-90e1a0: rtrim-up=3.79k VRP3-90E2A0: vid0=0, vid1=1 efficiency vin =12, vout=1.35v,iout=90a 81 84 - % vrp3-90e1a0: rtrim-up=7.86k VRP3-90E2A0: vid0=0, vid1=1, rtrim-down = 16.67k switching frequency - 400 - khz over temperature protection 100 - 120 c over voltage protection 105 - 115 %vo latch off weight - 33 - g fit 400 (design goal) - calculated per bell core sr-332 (vin=12 v, vo=1.2 v, io=80%load, t a = 25 c, fit=10 9 /mtbf) dimensions inches (l w h) millimeters (l w h) 2.00 x 1.2 x 0.70 50.8 x 30.48 x 17.8 - note : all specifications are typical at 25 c unless otherwise stated. efficiency data 69.00% 74.00% 79.00% 84.00% 89.00% 94.00% 9a 27a 45a 67.5a 90a output current(a) efficiency 6.5v 12 v 13.2 v vo=1.5v
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 4 non-isolated dc/dc converters 6.5 vdc - 13.2 vdc input, 1.2 vdc - 2.1 vdc output aug. 12, 2010 bel power inc., a subsidiary of bel fuse inc. thermal derating curves the thermal reference point is shown above. for reliable operation this temperature should not exceed 120 c. the output power of the module should not exceed the rated power for the module. vin=12v, vo=1.35v vin=12v, vo=2.1v temperature reference points on top side temperature reference points on bottom side
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 5 non-isolated dc/dc converters 6.5 vdc - 13.2 vdc input, 1.2 vdc - 2.1 vdc output aug. 12, 2010 bel power inc., a subsidiary of bel fuse inc. ripple and noise waveform note: ripple and noise at 12vdc input, vout=1.5v, iout=90a and ta=25 deg c, co=3600uf. transient response waveforms note : vout=1.5v, vin=12v@ta=25 , co= 3600uf.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 6 non-isolated dc/dc converters 6.5 vdc - 13.2 vdc input, 1.2 vdc - 2.1 vdc output aug. 12, 2010 bel power inc., a subsidiary of bel fuse inc. startup & shutdown rise time startup time shutdown test condition: 12vdc input, vout=1.5v, iout=90a and ta=25 deg c, co=3600uf test condition: 12vdc input, vout=1.5v, iout=90a and ta=25 de g c , co=3600uf test condition: 12vdc input, vout=1.5v, iout=90a and ta=25 de g c , co=3600uf startup from vin ch1: vo ch3: vin startup from on/off ch1: vo ch3: on/off test condition: 12vdc input, vout=1.5v, iout=0a and ta=25 de g c , co=3600uf test condition: 12vdc input, vout=1.5v, iout=90a and ta=25 de g c , co=3600uf
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 7 non-isolated dc/dc converters 6.5 vdc - 13.2 vdc input, 1.2 vdc - 2.1 vdc output aug. 12, 2010 bel power inc., a subsidiary of bel fuse inc. remote on/off parameter min typ max unit notes signal low (unit off) -0.3 - 0.8 v signal high (unit on) active high 2.4 - 5 v the remote on/off pin open, unit off. current sink 0 - 1 ma recommended remote on/off circuit for active high control with open collector/drain circuit control with photocoupler circuit control with logic circuit permanently off vin+ vin- on/off vin+ vin- on/off vin+ vin- on/off vcc vin+ vin- on/off
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 8 non-isolated dc/dc converters 6.5 vdc - 13.2 vdc input, 1.2 vdc - 2.1 vdc output aug. 12, 2010 bel power inc., a subsidiary of bel fuse inc. remote sense this module has remote sense compensation feature. it can minimize the effects of resistance between module?s output and load in system layout and facilitates accurate voltage regulation at load terminals or other selected point. 1. the remote sense lines carries very little current and hence do not require a large cross-sectional area. 2. this module compensates for a maximum drop of 10% of the nominal output voltage. 3. if the unit is already trimmed up, the available remote sense compensation range should be correspondingly reduced. the total voltage increased by trim and remote sense should not exceed 10% of the nominal output voltage. 4. when using remote sense compensation, all the resistance, parasitic inductance and capacitance of the system are incorporated within the feedback loop of this module. it can make an effect on the module's compensation, affecting the stability and dynamic response. a 0.1uf ceramic capacitor can be connected at the point of load to de-couple noise on the sense wires. 5. recommend the connection of remote sense compensation as below figure. there are a resistor rs+ (51.1 ohm) from vo+ to sense+ and a resistor rs- (51.1 ohm)) from vo- to sense- inside of this module. 6. if not using remote sense compensation, please connec t sense directly to output at module's pin, that is, connect sense+ to vo+ and sense- to vo- at module's pin, the shorter the better. see below figure. sense+ sense- rs- vo- vo+ rs+ load sense+ sense- rs- vo- vo+ rs + load
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 9 non-isolated dc/dc converters 6.5 vdc - 13.2 vdc input, 1.2 vdc - 2.1 vdc output aug. 12, 2010 bel power inc., a subsidiary of bel fuse inc. output trim equations vrp3-90e1a0 equations for calculating the trim resistor are shown below. the rtrim resistor should be connected between the trim pin and the vsense(-). maximum trim up voltage is 2.1v. the total voltage increased by trim and remote sense should not exceed 10% of the nominal output voltage. VRP3-90E2A0 equations for calculating the trim resistor are shown below. the trim down resistor should be connected between the trim pin and sense (+) pin. the trim up resistor should be connected between the trim pin and the gnd. only one of the resistors should be used for any given application. minimum trim down voltage is 1.1v maximum trim up voltage is 2.1v. the total voltage increased by trim and remote sense should not exceed 10% of the nominal output voltage. vid0 vid1 vout trim up equation trim down equation 0 0 1.2v 0 1 1.5v 1 0 1.8v 1 1 2.1v ) ( 2 . 1 11 ? = ? k vo r up trim ) ( 5 . 1 11 ? = ? k vo r up trim ) ( 8 . 1 11 ? = ? k vo r up trim ) ( 5 . 1 11 10 ? ? = ? k vo vo r down trim ) ( 8 . 1 11 10 ? ? = ? k vo vo r down trim ) ( 1 . 2 11 10 ? ? = ? k vo vo r down trim 1.1 () 1.21 trim up r k vo ? = ? module vout trim gnd rtrim-up module vsense+ trim gnd rtrim-down ) ( 1 . 2 11 ? = ? k vo r up trim ) ( 2 . 1 11 10 ? ? = ? k vo vo r down trim
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 10 non-isolated dc/dc converters 6.5 vdc - 13.2 vdc input, 1.2 vdc - 2.1 vdc output aug. 12, 2010 bel power inc., a subsidiary of bel fuse inc. over current protection the module is equipped with internal current-limiting circuitry in order to provide protection in a fault output overload condition. the module will be in latch off mode when the output current exceeds the current limit and restart by either cycling the input power or by toggling the on/off pin. over voltage protection the output over-voltage protection consists of circuitry that monitors the voltage on the output terminals. if the voltage on the output terminals exceeds the over voltage protection threshold, the module will shutdown into latch off mode. the over-voltage latch can be reset by either cycling the input power or toggling the on/off signal for one second at least. input under-voltage lockout input voltage (v) i n p u t c u r r e n t voltage falling voltage rising v1 v2 under-voltage lockout v1=5.1v v2=5.7v
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 11 non-isolated dc/dc converters 6.5 vdc - 13.2 vdc input, 1.2 vdc - 2.1 vdc output aug. 12, 2010 bel power inc., a subsidiary of bel fuse inc. power good 1. this module has a power good indicator output. power good pin used positive logic and is open collector. 2. power good pin can sink 10ma. 3. the maximum voltage pulled up externally on power good pin should not exceed 6v. 4. when a successful soft-start is completed, the power good pin will be pulled high. ch1: output voltage ch2: remote on/off ch3: pg typical start-up using remote on/off(vin=12.0v, vout=1.5v, io=90a) imon diagram note : the imon pin is the average channel-current sense output. this pin is used as a load current indicator to monitor the output load current. when iout = 90a the voltage on the imon pin = 900mv.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 12 non-isolated dc/dc converters 6.5 vdc - 13.2 vdc input, 1.2 vdc - 2.1 vdc output aug. 12, 2010 bel power inc., a subsidiary of bel fuse inc. mechanical outline note: this module is recommended and compatible with pb-free wave soldering and must be soldered using a peak solder temperature of no more than 26 0 oc for less than 5 seconds. note: 1) all pins: material - copper alloy; finish ? 3 micro inches minimum gold over 50 micro inches minimum nickel plate. 2) undimensioned components are shown for visual reference only. 3) all dimensions in inches (mm); tolerances: x.xx +/-0.0 2 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm). vrp3-90e1a0 pin function pin function pin function 1 reserved 9 psi# 17 gnd 2 reserved 10 pgood 18 gnd 3 reserved 11 vin 19 vout 4 imon 12 vin 20 vout 5 enable 13 gnd 21 gnd 6 vsense+ 14 gnd 22 gnd 7 vesnse- 15 vout 23 vout 8 trim 16 vout 24 vout VRP3-90E2A0 pin function pin function pin function 1 vid0 9 psi# 17 gnd 2 vid1 10 pgood 18 gnd 3 reserved 11 vin 19 vout 4 imon 12 vin 20 vout 5 enable 13 gnd 21 gnd 6 vsense+ 14 gnd 22 gnd 7 vesnse- 15 vout 23 vout 8 trim 16 vout 24 vout
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 13 non-isolated dc/dc converters 6.5 vdc - 13.2 vdc input, 1.2 vdc - 2.1 vdc output aug. 12, 2010 bel power inc., a subsidiary of bel fuse inc. signal definitions pin name pin description vid0, vid1 logic level inputs used to set the output voltage, refer to vid table. connect vid0 thru vid1 pins to open-drain outputs with external pull-up resistors or to active-pull-up outputs. valid logic low is -0.3v to 0.4v, valid logic high level is 0.8v to 5.3v. imon the imon pin is the average channel-current sense output. this pin is used as a load current indicator to monitor the output load current. the voltage on the imon pin = 900mv when iout = 90a. enable logic level input used to enable the converter when high. vsense+ positive remote sense. vsense- negative remote sense. trim output voltage trim. psi# a low input signal indicates the low power mode operation of the processor. the controller drops the number of active phases to single phase operation. a high input signal pulls the controller back to normal operation. pgood pgood indicates that soft-start has completed and the output voltage is within the regulated range around vid setting. vin input voltage of the converter. gnd common return for both input and output. vout output voltage of the converter.
? 2010 bel fuse inc. specifications subject to change without notice. 081210 14 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 6.5 vdc - 13.2 vdc input, 1.2 vdc - 2.1 vdc output aug. 12, 2010 bel power inc., a subsid iary of bel fuse inc. revision history date revision changes detail approval 2009-03-17 a first release xf jiang 2009-03-24 b updated mechanical drawing xf jiang 2009-04-22 c 1. correct error in part number explanation; 2. update mechanical drawing; 3. update ripple, switching frequency, ovp, fit, weight; 4. add efficiency data, td, nr, tr, startup&shutdown, pg waveforms. xf jiang 2009-05-05 d 1, add ripple and noise (p-p) under worst case. 2, add efficiency curve of 1.35v output. 3, add pin description. 4, update turn on/off voltage threshold. xf jiang 2009-05-15 e 1. add p/n VRP3-90E2A0; 2. adjust output voltage range; 3. update set point, efficiency, trim, fit. xf jiang 2010-03-30 f 1. remove ?preliminary?, add product picture; 2. input spec: 1)update turn on/off voltage; 3. output spec: 1)update output voltage setpoint of vrp3-90e1a0; 2) output current limit; 3) turn on delay time and rise time; 4) output capacitance; 5) transient response setting time. 4. general spec: 1)update switching frequency; 2)otp; 3)product weight. 5. update efficiency curve, thermal derating curves, trim, uvlo, mechanical top and bottom view. yf sun 2010-08-12 g add the diagram of imon yf sun rohs compliance complies with the european directive 2002/95/ec , calling for the elimin ation of lead and other hazardous substances from electronic products.

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