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Ideal Diode Bridge Controller

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Ideal Diode Bridge Controller LT4320/LT4320-1 Ideal Diode Bridge Controller FEATURES DESCRIPTION n Maximizes Power Efficiency The LT ®4320/LT4320-1 are ideal diode bridge controllers n Eliminates Thermal Design Problems that drive four N-channel MOSFETs, supporting voltage n DC to 600Hz rectification from DC to 600Hz typical. By maximizing n 9V to 72V Operating Voltage Range available voltage and reducing power dissipation (see n IQ = 1.5mA (Typical) thermograph comparison below), the ideal diode bridge n Maximizes Available Voltage simplifies power supply design and reduces power supply n Available in 8-Lead (3mm × 3mm) DFN, 12-Lead cost, especially in low voltage applications. MSOP and 8-Lead PDIP Packages An ideal diode bridge also eliminates thermal design APPLICATIONS problems, costly heat sinks, and greatly reduces PC board area. The LT4320’s internal charge pump supports an all- n Security Cameras NMOS design, which eliminates larger and more costly n Terrestrial or Airborne Power Distribution Systems PMOS switches. If the power source fails or is shorted, a n Power-over-Ethernet Powered Device with a fast turn-off minimizes reverse current transients. Secondary Input The LT4320 is designed for DC to 60Hz typical voltage n Polarity-Agnostic Power Input rectification, while the LT4320-1 is designed for DC to n Diode Bridge Replacement 600Hz typical voltage rectification. Higher frequencies of L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear operation are possible depending on MOSFET size and Technology Corporation. All other trademarks are the property of their respective owners. Patent pending. operating load current. TYPICAL APPLICATION Thermograph of Passive Diode Bridge + Temperature Rise OUTP DIODE TG1 TG2 MOSFET SBM CURRENT 2.5mΩ 1040 LT4320 4320 TA01b OUTPUT SBM1040 (×4) ~ IN1 IN2 9V TO 72V 2A 0.6°C 15°C Thermograph of LT4320 4A 3.5°C 32°C BG2 BG1 Driving Four MOSFETs 6A 6.7°C 49°C OUTN 8A 11°C 66°C INPUT DC TO 600Hz (TYP) 10A 16°C 84°C DC Input, On Same PCB – ~ 4320 TA01a 4320 TA01c LT4320+2.5mΩ FET (×4) CONDITIONS: 24V ACIN, 9.75A DC LOAD ON SAME PCB 4320fb For more information www.linear.com/LT4320 1 LT4320/LT4320-1 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Supply Voltages Operating Junction Temperature Range IN1, IN2 .................................................... –3V to 80V LT4320I ................................................–40°C to 85°C OUTP ..................................................... –0.3V to 80V LT4320H ............................................ –40°C to 125°C Output Voltages (Note 3) LT4320MP ......................................... –55°C to 125°C BG1, BG2, TG1, TG2 ............................... –0.3V to 80V Storage Temperature Range .................. –65°C to 150°C TG1-IN1, TG2-IN2 ....................................–0.3V to 12V Lead Temperature (Soldering, 10 sec) MSE, PDIP Packages ........................................300°C PIN CONFIGURATION TOP VIEW TOP VIEW TOP VIEW IN2 1 12 IN1 IN2 1 8 IN1 TG2 2 11 TG1 IN2 1 8 IN1 TG2 2 7 TG1 NC 3 10 NC 9 13 TG2 2 7 TG1 BG2 3 6 OUTP NC 4 9 OUTP BG2 5 8 NC BG2 3 OUTP BG1 4 5 OUTN 6 BG1 6 7 OUTN BG1 4 5 OUTN MSE PACKAGE DD PACKAGE 12-LEAD PLASTIC MSOP N8 PACKAGE 8-LEAD (3mm × 3mm) PLASTIC DFN 8-LEAD PLASTIC DIP TJMAX = 150°C, θJC = 10°C/W TJMAX = 150°C, θJC = 5.5°C/W EXPOSED PAD (PIN 13) MUST BE TJMAX = 150°C, θJC = 45°C/W EXPOSED PAD (PIN 9) MUST BE CONNECTED TO OUTN (PIN 7) CONNECTED TO OUTN (PIN 5) ORDER INFORMATION OPERATING JUNCTION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT4320IDD#PBF LT4320IDD#TRPBF LGCV 8-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C LT4320HDD#PBF LT4320HDD#TRPBF LGCV 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT4320IDD-1#PBF LT4320IDD-1#TRPBF LGCW 8-Lead (3mm × 3mm) Plastic DFN –40°C to 85°C LT4320HDD-1#PBF LT4320HDD-1#TRPBF LGCW 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT4320IMSE#PBF LT4320IMSE#TRPBF 4320 12-Lead Plastic MSOP –40°C to 85°C LT4320HMSE#PBF LT4320HMSE#TRPBF 4320 12-Lead Plastic MSOP –40°C to 125°C LT4320MPMSE#PBF LT4320MPMSE#TRPBF 4320 12-Lead Plastic MSOP –55°C to 125°C LT4320IMSE-1#PBF LT4320IMSE-1#TRPBF 43201 12-Lead Plastic MSOP –40°C to 85°C LT4320HMSE-1#PBF LT4320HMSE-1#TRPBF 43201 12-Lead Plastic MSOP –40°C to 125°C LT4320MPMSE-1#PBF LT4320MPMSE-1#TRPBF 43201 12-Lead Plastic MSOP –55°C to 125°C LT4320IN8#PBF NA LT4320N8 8-Lead PDIP –40°C to 85°C LT4320HN8#PBF NA LT4320N8 8-Lead PDIP –40°C to 125°C LT4320IN8-1#PBF NA LT4320N8-1 8-Lead PDIP –40°C to 85°C LT4320HN8-1#PBF NA LT4320N8-1 8-Lead PDIP –40°C to 125°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ 4320fb 2 For more information www.linear.com/LT4320 LT4320/LT4320-1 E LECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS OUTP Voltage Range l 9 72 V OUTP Undervoltage Lockout (UVLO) Threshold INn = OUTP, Other IN = 0V l 6.2 6.6 7.0 V l VINT INn Turn-On/Off Threshold OUTP = 9V, Other IN = 0V 1.3 3.7 V l IOUTP OUTP Pin Current INn = OUTP+ ∆VSD(MAX) + 5mV, Other IN = 0V 1.0 1.5 mA IINn INn Pin Current INn = OUTP+ ∆VSD(MAX) + 5mV, Other IN = 0V at 9V l 44 63 µA at 72V l 0.3 0.4 mA ∆VSD Topside Source-Drain Regulation Voltage (INn – OUTP) LT4320 l 8 20 35 mV LT4320-1 l 26 40 55 mV l ∆VTGATE Top Gate Drive (TGn – INn) INn = OUTP+ ∆VSD(MAX) + 5mV, 10μA Out of 6.6 10.8 V TGn, Other IN = 0V l VBGATE Bottom Gate Drive (BGn) INn = OUTP, 10μA Out of BGn, Other IN = 0V 7.0 12 V l ITGUn Top Gate Pull-Up Current TGn – INn = 0V, INn = OUTP + 0.1V 425 µA TGn – INn = 5V, INn = OUTP + 0.1V l 120 µA Current Flows Out of TGn, Other IN = 0V l ITGSn Top Gate Pull-Down Current to INn TGn – INn = 5V, INn = OUTP – 0.25V 1.25 mA Current Flows Into TGn, Other IN = 0V l ITGGn Top Gate Pull-Down Current to OUTN INn = 0V, Other IN = OUTP = 9.0V, TGn = 5V 6.0 mA Current Flows Into TGn l IBGUn Bottom Gate Pull-Up Current BGn = 5V; INn = OUTP = 9.0V, Other IN = 0V 1.9 mA Current Flows Out of BGn l IBGDn Bottom Gate Pull-Down Current BGn = 5V; INn = 0V, Other IN = OUTP = 9.0V 12.5 mA Current Flows Into BGn Note 1: Stresses beyond those listed under Absolute Maximum Ratings Note 2: All voltages are referenced to OUTN = 0V unless otherwise specified. may cause permanent damage to the device. Unless otherwise specified, Note 3: Externally forced voltage absolute maximums. The LT4320 may exposure to any Absolute Maximum Rating condition for extended periods exceed these limits during normal operation. may affect device reliability and lifetime. 4320fb For more information www.linear.com/LT4320 3 LT4320/LT4320-1 TYPICAL PERFORMANCE CHARACTERISTICS IINn and IOUTP vs OUTP IOUTP vs OUTP ∆VTGATE vs OUTP 1200 1200 11 OTHER IN = 0V IN1 AND IN2 FLOATING OTHER IN = 0V 1000 OUTP 1000 10 800 800 9 (V) 600 (µA) 600 TGATE OUTP I ∆V 8 CURRENT (µA) 400 400 INn 7 200 200 ∆VSD = 100mV ∆VSD = 40mV 0 0 6 0 20 40 60 80 0 20 40 60 80 9 13 17 21 25 INn = OUTP (V) OUTP (V) OUTP (V) 4320 G01 4320 G02 4320 G03 VBGATE vs OUTP TGn Pull-Up Strength TGn Pull-Down Strength to INn 12 1000 5 INn = OUTP + 100mV INn = OUTP – 250mV 900 OTHER IN = 0V OTHER IN = 0V 11 800 4 700 10 600 3 (V) (mA) 9 (µA) 500 TGn BGATE I TGSn V 400 I 2 8 300 200 7 OUTP = 9V 1 100 OUTP = 12V OUTP = 9V OTHER IN = 0V OUTP = 72V OUTP = 72V 6 0 0 9 13 17 21 25 0 2 4 6 8 10 12 0 2 4 6 8 10 12 OUTP (V) ∆VTGATE (V) ∆VTGATE (V) 4320 G04 4320 G05 4320 G06 TGn Pull-Down Strength to OUTN BGn Pull-Up Strength BGn Pull-Down Strength 60 5 35 INn = 0V OTHER IN = 0V OTHER IN = OUTP 50 30 4 25 40 3 20 (mA) (mA) (mA) 30 TGGn BGDn BGUn 15 I I I 2 20 10 1 OUTP = 9V VINn = 9V 10 5 OUTP = 12V VINn = 12V OUTP = 72V VINn = 72V 0 0 0 0 2 4 6 8 10 12 0 2 4 6 8 10 12 14 0 2 4 6 8 10 12 TGn (V) VBGATE (V) VBGATE (V) 4320 G07 4320 G08 4320 G09 4320fb 4 For more information www.linear.com/LT4320 LT4320/LT4320-1 PIN FUNCTIONS (DFN, PDIP/MSOP) IN2 (Pin 1/Pin 1): Bridge Rectifier Input. IN2 connects to OUTP (Pin 6/Pin 9): OUTP is the rectified positive output the external NMOS transistors MTG2 source, MBG1 drain voltage that powers the LT4320 and connects to the drains and the power input.
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