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Ideal diode module/Controllers

Ideal diode characteristics

An ideal semiconductor should behave as a switch. In other words, an ideal diode should show infinite conductance when active, behaving as a closed circuit. Also, it should show infinite resistance when inactive, behaving as an open circuit. Since it shows infinite conductance in operating mode, there is apparently no potential drop across it.

Need for an Ideal diode module

A practical general-purpose semiconductor diode, however, is quite different in terms of its current-voltage characteristics. Unlike an ideal diode, a practical semiconductor diode does not show infinite conductance on forward biasing but it follows some relations with the forward voltage. In fact, the conduction does not start significantly unless the forward current rises above a certain threshold called knee voltage.

Practical diodes also don’t show infinite resistance on reversed biasing as there is always a small reverse saturation current or leakage current.

Since there is a voltage drop equal to the knee voltage across the diode when it is forward biased. This potential drop produces heat as per the Joule’s heat law. This heat does not only result in unnecessary power loss, but also imposes limitations on the power ratings of the diode.

Due to these limitations of a standard semiconductor diode, ideal diode modules are preferred over general diode in a number of applications.

Construction and working of an Ideal diode module

The basic circuit of an ideal diode module consists of a normal diode connecting the input and output sides of the circuit with its positive end towards the input. There is a power MOSFET connected across the diode with its drain and source connected to the positive and negative sides of the diode, respectively. There is also a control unit which measures the voltage across the diode and controls the gate of the MOSFET accordingly. When the control unit finds a positive potential drop across the diode, it switches ON the FET and the diode is short-circuited, removing the potential drop across it. Thus, heating issues are almost completely eliminated.

Applications

In power backup systems and battery charging systems, it is very important to prevent the current from the main power supply from flowing into the backup systems and damaging them. An ideal diode module is highly suitable for this purpose as it does not only prevent the reverse current but also eliminates any power dissipation in the form of heat. The ideal diode module can also be used in electrical systems where non-rechargeable batteries are used as a backup to the main power supply to prevent reverse current from flowing into the batteries and damaging them.

PMIC - OR Controllers, Ideal Diodes

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Image Part Number Description Package In Stock Quantity
LTC4359CS8#PBF LTC4359CS8#PBFLinear TechnologyPMIC - OR Controllers, Ideal Diodes, PWR MGMT BATTERY MGMT8-SOIC (0.154", 3.90mm Width)In Stock: 539 piece(s)
MAX16141AAF+ MAX16141AAF+Maxim IntegratedPMIC - OR Controllers, Ideal Diodes, IC IDEAL DIODE CTLR 16TQFN16-WQFN Exposed PadIn Stock: 483 piece(s)
LTC4418IUF#TRPBF LTC4418IUF#TRPBFLinear TechnologyPMIC - OR Controllers, Ideal Diodes, IC CTRLR DUAL PWRPATH 20QFN20-WFQFN Exposed PadIn Stock: 284 piece(s)
ISL6144IRZA ISL6144IRZARenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 20QFN20-VQFN Exposed PadIn Stock: 974 piece(s)
ISL6146BFUZ-T7A ISL6146BFUZ-T7ARenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 8MSOP8-TSSOP, 8-MSOP (0.118", 3.00mm Width)In Stock: 295 piece(s)
ISL6146AFUZ-T7A ISL6146AFUZ-T7ARenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 8MSOP8-TSSOP, 8-MSOP (0.118", 3.00mm Width)In Stock: 226 piece(s)
ISL6146CFUZ-T7A ISL6146CFUZ-T7ARenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 8MSOP8-TSSOP, 8-MSOP (0.118", 3.00mm Width)In Stock: 135 piece(s)
ISL6146AFRZ-T7A ISL6146AFRZ-T7ARenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 8DFN8-VDFN Exposed PadIn Stock: 472 piece(s)
ISL6146BFUZ-T ISL6146BFUZ-TRenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 8MSOP8-TSSOP, 8-MSOP (0.118", 3.00mm Width)In Stock: 248 piece(s)
ISL6146BFUZ ISL6146BFUZRenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 8MSOP8-TSSOP, 8-MSOP (0.118", 3.00mm Width)In Stock: 623 piece(s)
ISL6146CFUZ ISL6146CFUZRenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 8MSOP8-TSSOP, 8-MSOP (0.118", 3.00mm Width)In Stock: 809 piece(s)
ISL6146DFRZ ISL6146DFRZRenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 8DFN8-VDFN Exposed PadIn Stock: 1608 piece(s)
ISL6146AFUZ ISL6146AFUZRenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 8MSOP8-TSSOP, 8-MSOP (0.118", 3.00mm Width)In Stock: 1928 piece(s)
hotISL6146AFRZ ISL6146AFRZRenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 8DFN8-VDFN Exposed PadIn Stock: 1612 piece(s)
ISL6146BFRZ ISL6146BFRZRenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 8DFN8-VDFN Exposed PadIn Stock: 3184 piece(s)
ICL7673CBAZA-T ICL7673CBAZA-TRenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR SRC SELECT 8SOIC8-SOIC (0.154", 3.90mm Width)In Stock: 439 piece(s)
FPF3042UCX FPF3042UCXON SemiconductorPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR SRC SELECT 16WLCSP16-UFBGA, WLCSPIn Stock: 185 piece(s)
hotFPF3040UCX FPF3040UCXON SemiconductorPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR SRC SELECT 16WLCSP16-UFBGA, WLCSPIn Stock: 3222 piece(s)
hotISL6144IVZA ISL6144IVZARenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 16TSSOP16-TSSOP (0.173", 4.40mm Width)In Stock: 9600 piece(s)
hotICL7673CPAZ ICL7673CPAZRenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR SRC SELECT 8DIP8-DIP (0.300", 7.62mm)In Stock: 346 piece(s)
hotLTC4418CUF#PBF LTC4418CUF#PBFLinear TechnologyPMIC - OR Controllers, Ideal Diodes, IC CTRLR DUAL PWRPATH 20QFN20-WFQFN Exposed PadIn Stock: 762 piece(s)
ISL6144IVZA-T7A ISL6144IVZA-T7ARenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 16TSSOP16-TSSOP (0.173", 4.40mm Width)In Stock: 1360 piece(s)
ICL7673CBAZA ICL7673CBAZARenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR SRC SELECT 8SOIC8-SOIC (0.154", 3.90mm Width)In Stock: 4122 piece(s)
ISL6146BFRZ-T7A ISL6146BFRZ-T7ARenesas Electronics AmericaPMIC - OR Controllers, Ideal Diodes, IC OR CTRLR N+1 8DFN8-VDFN Exposed PadIn Stock: 1725 piece(s)
hotLTC4418IUF#PBF LTC4418IUF#PBFLinear TechnologyPMIC - OR Controllers, Ideal Diodes, IC CTRLR DUAL PWRPATH 20QFN20-WFQFN Exposed PadIn Stock: 737 piece(s)
MP6914DN-LF MP6914DN-LFMonolithic Power Systems Inc.PMIC - OR Controllers, Ideal Diodes, IC REG BUCK SYNC FLYBK-In Stock: 179 piece(s)
MAX16141AAF/V+ MAX16141AAF/V+Maxim IntegratedPMIC - OR Controllers, Ideal Diodes, 36V ORING MOSFET CONTRLR W/VOLT16-WQFN Exposed PadIn Stock: 280 piece(s)
MAX16141AAF/V+T MAX16141AAF/V+TMaxim IntegratedPMIC - OR Controllers, Ideal Diodes, 36V ORING MOSFET CONTRLR W/VOLT16-WQFN Exposed PadIn Stock: 292 piece(s)
MAX16141AAF+T MAX16141AAF+TMaxim IntegratedPMIC - OR Controllers, Ideal Diodes, 36V ORING MOSFET CONTRLR W/VOLT16-WQFN Exposed PadIn Stock: 353 piece(s)
ZXGD3114N7TC ZXGD3114N7TCDiodes IncorporatedPMIC - OR Controllers, Ideal Diodes, OR'ING CONTROLLER SO-7 T&R 2.5K8-SOIC (0.154", 3.90mm Width), 7 LeadsIn Stock: 295 piece(s)