In conventional vehicles the electrical system is based on a 12V distribution network. When the vehicle is off and starting the electrical bus is supported by a 12V lead acid battery. When the vehicle is operating an alternator connected to the engine provides the power for all electrical loads and also recharges the battery.

But in HEV and EV vehicles the internal combustion engine can be off for extended periods of time, hence the alternator cannot be relied upon to provide power to auxiliary loads. Since in these vehicles a high voltage battery is already present a DC/DC converter can be used to replace the function performed by the alternator by linking the high voltage and low voltage distribution system. This DC/DC converter is isolated, often bi-directional, and is sized in the range of 1 to 3 kW.

For Push-Pull forward DC-DC converter applications

Part Number	Description	Packages	Output Current	Offset Voltage
AUIRS4426S AUIRS4427S AUIRS4428S	Dual Channel Low Side	SOIC8	+2.3 / -3.3A	25V

High Voltage Switching Stage IGBT

Part Number	Package	VCES	IC @TC=100°C	VCE(ON) typ
AUIRGP4063D	TO247	600V	48A	1.65V
AUIRGP35B60PD	TO247	600V	34A	1.85V
AUIRGP50B60PD1	TO247	600V	45A	2.00V

High Voltage Switching Stage MOSFET

Vds (V)	Rds(on max (mO)		Id max @25°C (A)	Qg typ (nC)		DPAK	D2PAK D2PAK-7p TO262	TO220	TO247
	@10V Vgs	@4.5V Vgs		@10V Vgs	@4.5V Vgs
250V	33		60	99				AUIRFB4332
250V	19.7		85	202					AUIRFP4768

High Voltage Switching Stage DirectFET

Vds (V)	Rds(on max (mO)		Id max @25°C (A)	Qg typ (nC)		Small	Medium	Large
	@10V Vgs	@4.5V Vgs		@10V Vgs	@4.5V Vgs
250V	38		35	110				AUIRF7799L2

Synchronous Rectification Stage Drivers

Part Number	Description	Packages	Output Current	Offset Voltage	VCC UVLO
AUIRS4426S AUIRS4427S AUIRS4428S	Dual Channel Low Side	SOIC8	+2.3 / -3.3A	25V	N/A

Synchronous Rectification Stage MOSFET

Vds (V)	Rds(on max (mO)		Id max @25°C (A)	Qg typ (nC)		DPAK	D2PAK D2PAK-7p TO262	TO220	TO247
	@10V Vgs	@4.5V Vgs		@10V Vgs	@4.5V Vgs
100	4		190	143			AUIRFS4010 AUIRFS4010-7P AUIRFSL4010	AUIRFB4010
100		4.1	190		87		AUIRLS4010 AUIRLS4010-7P AUIRLSL4010	AUIRLB4010
75	1.85		350	380					AUIRFP4368
75	2.6		260	160			AUIRFS3107 AUIRFS3107-7P
40	1.4		400	198			AUIRFS3004 AUIRFS3004-7P AUIRFSL3004	AUIRFB3004
40		1.4	380		120		AUIRLS3034 AUIRLS3034-7P AUIRLSL3034	AUIRLB3034
40	1.6		320	170			AUIRF2804S AUIRF2804S-7P AUIRF2804SL	AUIRF2804
24	1.0		429	180			AUIRF1324S AUIRF1324S-7P	AUIRF1324

Synchronous Rectification Stage DirectFET

Vds (V)	Rds(on max (mO)		Id max @25°C (A)	Qg typ (nC)		Small	Medium	Large
	@10V Vgs	@4.5V Vgs		@10V Vgs	@4.5V Vgs
100	4.4		114	81				AUIRF7669L2
75	2.3		160	200				AUIRF7759L2
40	1		270	220				AUIRF7739L2
40	1.6		209	147				AUIRF7738L2
40	2.2		167	104				AUIRF7737L2
40	3.1		141	83			AUIRF7736M2