View IR25750L_7802467.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

ir 2575 0 l pb f 1 www.irf.com ? 201 4 international rectifier march 11 , 201 4 sot - 23 current sensing ic base part number package type standard pack orderable part number form quantity IR25750Lpbf sot23 - 5l tape and reel 3 000 IR25750Ltrpbf features ? v ds (on) or vce(on) sensing ? eliminate s external current sensing resistors ? enables inductance - less current sensing ? 600v blocking capability ? programmability and temperature compensation possible ? no vcc required ? gate drive on/off sync input ? f ilter delay at gate turn - on (200nsec typ.) ? 20.8v zener clamps on gate and cs pins ? integrated esd protection and latch immunity on all pins ? tiny 5 - pin sot - 23 package applications ? mosfet , directfet, or igbt current sensing ? over - current protection ? industrial applications ? motor control ? power tools ? brick converters ? forklift s ? induction heating description the ir25750 l is a novel current sensing ic that extracts the vds(on) of a power mosfet , or the vce(on) of an igbt, during the switch on - time. irs proprietary 600v hvic technology then blocks the high drain voltage to dur ing the mosfet or igbt off - time. this ic allows for external current sensing resistors to be eliminated for reducing power losses and increasing overall system efficiency. the ic includes a gate drive input that provides vcc supply voltage to the ic and sy nchroniz es the internal sens ing circuit to the on and off times of the switch . programmability and temperature compensation are also possible. package options 5 lead sot 23 typical connection diagram ordering information
ir 2575 0 l p b f 2 www.irf.com ? 201 4 international rectifier march 11 , 201 4 table of contents page description 1 ordering information 1 typical connection diagram 1 absolute maximum ratings 3 recommended operating conditions 3 electrical characteristics 4 functional block diagram 5 timing diagram 6 pin definitions 7 pin assignments 7 input / output pin equivalent circuit diagrams 8 functional description 9 package details: 5l sot - 23 1 3 tape and reel details: 5l sot - 23 1 4 part marking information 1 6 qualification information 1 7
ir 2575 0 l p b f 3 www.irf.com ? 201 4 international rectifier march 11 , 201 4 absolute maximum ratings absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. all voltage parameters are absolute voltages referenced to com, all currents are defined positive into any pin. the thermal r esistance and power dissipation ratings are measured under board mounted and still air conditions. symbol definition min max units v s vs pin voltage - 20 ? 625 v v gate gate pin voltage - 0.3 v clamp ? ? v cs cs pin voltage p d package power dissipation @ ta ? +25 oc 5l sot - 23 250 mw r ja thermal resistance, junction to ambient 5l sot - 23 191 oc/w t j junction temperature - 55 150 oc t s storage temperature t l ic p in temperature (soldering, 10 seconds) 300 ? the test condition for th e minimum C vs rating is for a pulse width of 1usec. larger pulse widths will result in a lower C vs voltage rating. ? ? this ic contains a 20.8v voltage clamp structure between the gate and com pins, and , between the cs and com pins . please note that this pin should not be driven by a dc, low impedance power source greater than the vclamp specified in the electrical characteristics section. recommended operating conditions for proper operation the device should be used within the recommended conditions. sy mbol definition min max units v s vs pin voltage - 5 .0 600 v v gate gate pin voltage com v clamp v cs cs pin voltage t j junction temperature - 40 125 oc
ir 2575 0 l p b f 4 www.irf.com ? 201 4 international rectifier march 11 , 201 4 electrical characteristics t a = 25 c unless otherwise specified. all parameters are referenced to com. symbol definition min typ max units test conditions gate pin characteristics t dly gate - to - cs rising - edge blank delay time gate = rising edge v clamp1 gate pin internal zener clamp voltage 21.1 22.5 24.0 v i gate = 1ma high - voltage switching node input (vs pin) characteristics i lk offset supply leakage current ? gate = com, v s = 600v r vs_cs vs - to - cs on resistance ? gate = 15v cs pin characteristics v cs_low cs pin voltage during gate pin low gate = com v clamp2 cs pin internal zener clamp voltage cs = 1ma
ir 2575 0 l p b f 5 www.irf.com ? 201 4 international rectifier march 11 , 201 4 functional block diagram g a t e h v f e t c s v s c o m 3 5 4 r 1 c 1 d 1 q 1 5 0 k 1 k 1 5 k 1 0 p f
ir 2575 0 l p b f 6 www.irf.com ? 201 4 international rectifier march 11 , 201 4 timing diagram g a t e v s c s t 6 0 0 v m a x t t o n o f f o f f t d l y
ir 2575 0 l p b f 7 www.irf.com ? 201 4 international rectifier march 11 , 201 4 pin definitions pin assignments 5 - lead sot 23 pin symbol description 1 cs c urrent se nse output 2 n/c no connect 3 gate vcc supply and on / off sync input 4 com ic ground 5 vs switch drain or collector input sensing node 5 4 1 2 i r 2 5 7 5 0 l v s c o m c s n / c 3 g a t e
ir 25750 l pb f 8 www.irf.com ? 201 4 international rectifier february , 201 4 input / output pin equivalent circui t diagrams g a t e c o m c s 2 0 . 8 v v s 2 0 . 8 v 6 0 0 v
ir 2575 0 l p b f 9 www.irf.com ? 201 4 international rectifier march 11 , 201 4 functional description i. general description the IR25750L current sensing circuit eliminates the traditional series - connected sensing resistor and is connected instead in parall el to the power switch. the circuit measures the v ds(on) of the switching power mosfet or vce(on) of an igbt. the ic has four external connection nodes (vs, gate, cs, com) and includes ( figure 1 ): a 600v mosfet (hvfet); an rc - delay circuit (r1, c1, d1); an d a pmos hold - down transistor (q1). the circuit does not require a vcc supply node and instead utilizes the existing gate drive signal for powering and turning the circuit on and off. during the off - time of the external power switch ( m1 ) , the gate drive si gnal is at com, the hvfet is off, q1 is on, and the cs node is held at com. since the internal hvfet is off, any high voltage occurring at the drain of the power mosfet (600vmax) will be safely blocked by the hvfet from the rest of the low - voltage circuitr y. when m1 is turned on by the gate drive signal, the drain voltage of m1 will decrease to a level given by the vds(on) of m1. after a short delay time (200nsec, typical) set by the internal r - c delay block ( r1, c1 ) , the gate voltage of the hvfet rises up and turns the hvfet on. q1 turns off, therefore releasing the cs output pin . the vds(on) of m1 is then transmitted from the vs pin, through the hvfet , to the cs output pin . the re is an internal voltage divider formed by a 1kohm resistor at the vs pin, the rds(on) of the hvfet (0.2kohm) , and a 50kohm resistor from the source of hvfet to com . the ratio of this resistor divider is approximately unity (50/51.2), resulting an excellent matching from the vs pin to the cs pin. a small series r - c filter (5k and 10p f) also exists at the cs pin to help suppress high - frequency noise. also, important to note, to avoid internal high - voltage damage to the ic, the IR25750L must always turn on after a slight delay from m1 (as set by the internal 200nsec delay block). to ens ure this delay, the gate resistor (rgate) must be placed before the gate pin of the IR25750L and the gate of m1. the gate pin of the IR25750L and the gate of m1 are then connected together to form a single gate node. when the gate drive signal of m1 goes low again, m1 turns off , and t he gate of the hvfet gets discharged quickly through d1 . the hvfet turns off again and block s any high voltage occurring at the drain of m1. the cs output pin is then held at com again through q1. assuming the drain of m1 is a typical high - voltage switching node that is connected to an inductor, the voltage signal produced at the cs output node will be the same sawtooth waveform that would result from using a traditional current sensing resistor placed at the source of m1 ( figu re 2 ) . the cs output pin can then be connected to a comparator circuit or used for any other desired current - sensing functions of a pwm controller or mcu circuit. figure 1 : IR25750L internal circuit diagram . g a t e h v f e t c s v s c o m 3 5 4 r 1 c 1 d 1 q 1 h i g h - v o l t a g e s w i t c h i n g n o d e p o w e r g r o u n d m 1 g a t e d r i v e i n p u t i r 2 5 7 5 0 l 5 0 k 1 k r g a t e 1 v c s o u t p u t 5 k 1 0 p f
ir 2575 0 l p b f 10 www.irf.com ? 201 4 international rectifier march 11 , 201 4 figure 2 : IR25750L timing diagram. ii. pcb layout guidelines since no vcc node is required for this circuit, the pcb layout becomes very simple to design ( figure 3 ). the IR25750L can be placed conveniently next to the power mosfet or i gbt and connected easily to the existing pcb traces that are already used for the power switch (gate, drain, source ). only the cs trace needs to be routed back to the main pwm controller or mcu of the power supply circuit . also, important to note, the powe r ground of the switching circuit must be separate from the com connection of the IR25750L. the com pin of the IR25750L should be connected to the source of the power mosfet with a single trace only , and, t he power ground should not be routed through the c om pin of the IR25750L. a typical pcb layout is also shown for a directfet footprint ( figure 4 ). again, the IR25750L can be placed directly next to the mosfet and connected to the existing traces. g a t e v s c s t 6 0 0 v m a x t t o n o f f o f f t d l y
ir 2575 0 l p b f 11 www.irf.com ? 201 4 international rectifier march 11 , 201 4 figure 3: IR25750L typic al pcb surface - mount layout (dpak or d2pak mosfet or igbt) . figure 4 : IR25750L typical pcb surface - mount layout (directfet) . single trace from ic com to source. keep power ground separate from ic com connection. s ingle trace from ic com to source. keep power ground separate from ic com connection. p o w e r m o s f e t o r i g b t ( d p a k ) r g a t e i r 2 5 7 5 0 l c s o u t p u t f r o m i n d u c t o r p o w e r g r o u n d g a t e d r i v e s i g n a l d g s s w i t c h e d n o d e c s g a t e c o m v s n / c
ir 2575 0 l p b f 12 www.irf.com ? 201 4 international rectifier march 11 , 201 4 ii i . current sensing functionality with the IR25750L connected properly in a switching circuit application, the wa veforms ( figure 4 ) show the functionality of the circuit and the desired current sense signal at the cs pin . compared to the conventional resistor sensing method, both methods match the actual current shape and both exhibit noise spikes due to switching. p roper filtering or digital blanking of the final pwm or mcu current sensing circuit will easily ignore these noise spikes to prevent any false triggering. figure 4 : IR25750L switching waveforms vs. resistor method ( green =idrain, red =vcs, b lue =gate) . (r cs=0.21 ohms, rds(on)=0.18 ohms)
ir 2575 0 l p b f 13 www.irf.com ? 201 4 international rectifier march 11 , 201 4 p ackage details: 5 l sot - 23
ir 2575 0 l p b f 14 www.irf.com ? 201 4 international rectifier march 11 , 201 4 tape and reel details: 5 l sot - 23
ir 2575 0 l p b f 15 www.irf.com ? 201 4 international rectifier march 11 , 201 4 tape and reel details: 5 l sot - 23
ir 2575 0 l p b f 16 www.irf.com ? 201 4 international rectifier march 11 , 201 4 part marking information : 5l sot - 23 top marking bottom marking y w l c l o t c o d e d a t e c o d e d i r l o g o p a r t n o .
ir 2575 0 l p b f 17 www.irf.com ? 201 4 international rectifier march 11 , 201 4 qualification information ? qualification level industrial ?? (per jedec jesd 47 ) comments: this family of ics has passed jedecs industrial qualification. irs consume r qualification level is granted by extension of the higher industrial level. moisture sensitivity level sot - 23 msl 1 ??? (per ipc/jedec j - std - 020) esd machine model class a (per jedec standard eia/jesd22 - a115 - a) human body model class 1b (per ansi/esda/ jedec standard j s - 001 - 2012 ) ic latch - up test class i, level a (per jesd78 ) rohs compliant yes ? qualification standards can be found at international rectifiers web site http://www.irf.com/ ?? higher qualification ratings may be available should the user have such requirements. please contact your international rectifier sales representative for further information. ??? higher msl ratings may be available for the specific package types listed here. please contac t your international rectifier sales representative for further information. the information provided in this document is believed to be accurate and reliable. however, international rectifier assumes n o responsibility for the consequen ces of the use of this information. international rectifier assumes no responsibility for any infringement of patents or of other rights of third parties which may result from the use of this information. no license is granted by implication or oth erwise under any patent or patent rights of international rectifier. the specifications mentioned in this document are subject to change with out notice. this document supersedes and replaces all information previously supplied. for technical support, pleas e contact irs technical assistance center world headquarters: 233 kansas st., el segundo, california 90245 tel: (310) 252 - 7105

▲Up To Search▲

Price & Availability of IR25750L

	To Download IR25750L Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .