TDK iFA Series manual Absolute Maximum Ratings, Input Characteristics

Advance Data Sheet: MaxetaTM iFA Series

Absolute Maximum Ratings:

Stress in excess of Absolute Maximum Ratings may cause permanent damage to the device.

Characteristic	Min	Max	Unit	Notes & Conditions
Continuous Input Voltage	-0.5	40	Vdc

Transient Input Voltage	---	50	Vdc	100mS max.
Isolation Voltage
Input to Output	---	1500	Vdc	Basic Insulation
Input to Base-plate	---	1500	Vdc	Basic Insulation
Output to Base-plate	---	500	Vdc	Operational Insulation
Storage Temperature	-55	125	˚C
				Measured at the location specified in the thermal
Operating Temperature Range (Tc)	-40	115*	˚C	measurement figure; maximum temperature varies with
				output current and module orientation – see curve in the
				thermal performance section of the data sheet.

Input Characteristics:

Unless otherwise specified, specifications apply over all Rated Input Voltage, Resistive Load, and Temperature conditions.

Characteristic Min Typ Max Unit Notes & Conditions

		24			When 18V ≤ Vin < 19V, the modules will
Operating Input Voltage	19		36	Vdc	continue to operate, but the output
		(28) #			voltage regulation may be out of spec at
					full load condition
Input Current	---	28.2	37	A	Vin = 0 to Vin,max
Input Low End Turn-on Voltage	---	17.9	19	Vdc
Input Low End Turn-off Voltage	---	16.1	19	Vdc
Hysteresis	---	1.8	---	Vdc
Input Over-voltage Turn-off Voltage	---	38.6	---	Vdc
Input High End Turn-on Voltage	36	37.6	---	Vdc
Startup Delay Time from application of input voltage	---	10	---	mS	Vo = 0 to 0.1*Vo,nom; on/off =on,
					Io=Io,max, Tc=25˚C
Startup Delay Time from on/off	---	8	---	mS	Vin = Vin,nom, Io=Io,max, Tc=25˚C
Output Voltage Rise Time	---	42	60*	mS	Io=Io,max, Vo=0.1 to 0.9*Vo,nom,
					Tc=25˚C
Inrush Transient	---	---	1*	A2 S
					Vin=Vin,nom, Io=Io,max (0 to 20MHz)
Input Reflected Ripple	---	5	---	mApp	See input/output ripple measurement
					figure; BW = 5 MHz
Input Ripple Rejection	---	41	---	dB	@120Hz

* Engineering Estimate

#Telecom 24V battery plant voltage is typically set at 27.24V

Caution: The power modules are not internally fused. An external input line fuse with a maximum value of 40A is required. See the Safety Considerations section of the data sheet.

©2005 TDK Innoveta Inc.		￿ (877) 498-0099
iFA Advance Datasheet	6/6/2005	5/18