Texas Instruments PT3341A, PT3341C, PT3341N, PT3342A, PT3342C Datasheet

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P T 3 3 4 0 S e r i e s

		Revised 5/19/99
	30 WATT ISOLATED	Application Notes
		Mechanical Outline
	DC/DC CONVERTER
		Product Selector Guide

SIPs

New	30W	Isolated

The PT3340 is a new series of highinput voltage, 30 Watt, isolated DC to DC converters housed in a unique vertical or horizontal 19-pin SIP package. The 18 to 60V input range allows easy integration into many distributed power applications which utilize 24V bus architectures.

The PT3340 series is available with output voltages from 3.3V to 15V. The output voltage is adjustable from 90 to

110% of nominal with the addition of an external resistor. Other easy to use features include an inhibit function and a differential remote sense which automatically compensates for any voltage drop from the converter to the load. The PT3340 includes built in current limit, short circuit protection and overtemperature shutdown.

The PT3340 requires a 330µF output capacitor for proper operation.

Patent pending*

Standard Application																							Pin-Out Information
																							Pin	Function					Pin	Function
VO Adjust																							1	Do Not Use					10	-Vo
							18					19		+REMOTE SENSE
	+V																					2		Inhibit				11		-Vo
	IN						7-9
								PT3340					14-17			+VO						3		Do Not Use				12		-Vo
							2																4	-Vin					13	-Remote Sense
																+
				+										C					LOAD			5		-Vin				14		+Vo
		C							4-6	13	10-12
				IN										OUT
																							6	-Vin					15	+Vo
	Inhibit						Q1									-VO
																							7	+Vin					16	+Vo
	-VIN													-REMOTE SENSE
																							8	+Vin					17	+Vo
				Cin			= Optional 100µF/100V electrolytic
																						9		+Vin				18		Vo Adjust
				Cout = Required 330µF electrolytic
				Q1			= NFET
																												19		+Remote Sense
Preliminary Specifications
	Characteristics																									PT3340 SERIES
	(Ta = 25°C unless noted)									Symbols						Conditions										Min			Typ		Max	Units
	Output Current									Io						Over Vin range						Vo = 3.3V				0.25			—		8.0	A
																						Vo = 5V				0.25			—		6.0	A
																						Vo = 12V				0.1			—		2.5	A
	On/Off Standby Current									Iin standby						Vin = 24V, Pin 1 = -Vin										—		7			14	mA
	Short Circuit Current									Isc						Vin = 24V										—			Iomaxx2		—	A
	Input Voltage Range									Vin						Over Io Range										18.0		24.0			60.0	V
	Output Voltage Tolerance									∆Vo						Over Vin Range										—		±1.0			—	%Vo
																TA= -40°C to +85°C
	Line Regulation									Regline						Over Vin range @ max Io										—		±0.5			—	%Vo
	Load Regulation									Regload						10% to 100% of Io max										—		±0.5			—	%Vo
	Vo Ripple/Noise									Vn						Vin=24V, Io=Io max, Vo>5V										—		1.0			—	%Vo
																Vin=24V, Io=Io max, Vo<5V										—		50			—	mVpp
	Transient Response									ttr						50% load change, 1A/µSec										—		100			—	µSec
																Vo over/undershoot, Vo>5V										—		3.0			—	%Vo
	Efficiency									η						Vin=24V, Io=6A, Vo=3.3V										—		80			—	%
																Vin=24V, Io=6A, Vo=5V										—		82			—	%
																Vin=24V, Io=2.5A, Vo=12V										—		86			—	%
	Switching Frequency									ƒo						Over Vin and Io						Vo<10V				600		750			900	kHz
																						Vo>10V				400		500			600	kHz
	Recommended Operating									Ta						Vin = 48V @ max Io										-40*			—		+85	°C
	Temperature Range															Airflow = 200 LFM
	Storage Temperature									Ts						—										-40			—		+125	°C
	Mechanical Shock									—						Per Mil-Std-883D, method 2002.3,										—		500			—	G’s
																1mS, half-sine, mounted to a fixture
	Mechanical Vibration									—						Per Mil-Std-883D, method 2007.2,										—		10			—	G’s
																20-2000Hz, soldered in a PC board
	Weight									—						—										—		40			—	grams
	Input/Output Isolation									—						—										1500			—		—	VDC
	Capacitance									—						—										—		1200			—	pF
	Resistance									—						—										10			—		—	MΩ
	Flammability									—						Materials meet UL 94V-0
	Inhibit (pin 2)									On**						Referenced to -Vin										2.5			—		15	VDC
										Off																0			—		0.8	VDC

*At temperatures below 0°C, the PT3340 series requires output capacitors with temperature stable dielectrics such as tantalum or Oscon.

** If pin 2 is left open, the PT3340 will operate when input power is applied.

Features

•30W Output Power

•Input Voltage Range: 18V to 60V

•1500 VDC Isolation

•Vo Inhibit

•Vo Adjust

•Differential Remote Sense

•Current Limit

•Short-Circuit Protection

•Over-Temperature Shutdown

•Undervoltage Lockout

•Flexibile SIP Package

•UL 1950, CSA 22.2 950 approval pending

•Meets EN60950

Ordering Information

PT3341¨ = 3.3V/8A PT3342¨ = 5.0V/6A PT3343¨ = 12.0V/2.5A PT3344¨ = 15.0V/2A

PT Series Suffix (PT1234X)

Case/Pin

Configuration

Vertical Through-Hole	N
Horizontal Through-Hole	A
Horizontal Surface Mount	C

(For dimensions and PC board layout, see Package Styles 840 and 850.)

* Note: This product is the subject of one or more patents. Other patents pending.

Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 [phone] Fax: [phone] http://www.powertrends.com

For assistance or to order, call [phone]

P T 3 3 4 0 S e r i e s

C H A R A C T E R I S T I C D A T A

PT3341, 3.3 VDC (See Note 1)

	Efficiency vs Output Current
	100
	90
(%)	80				Vin
					18.0V
Efficiency	60
					24.0V
	70				36.0V
					48.0V
					60.0V
	50
	40
	0	2	4	6	8

Iout (A)

PT3342, 5.0 VDC (See Note 1)

	Efficiency vs Output Current
	100
	90
(%)	80						Vin
							18.0V
Efficiency	60
							60.0V
	70						24.0V
							36.0V
							48.0V
	50
	40
	0	1	2	3	4	5	6

Iout (A)

PT3343, 12.0 VDC (See Note 1)

	Efficiency vs Output Current
	100
	90
(%)	80					Vin
						18.0V
Efficiency	60					24.0V
						36.0V
	70
						48.0V
						60.0V
	50
	40
	0.0	0.5	1.0	1.5	2.0	2.5

Iout (A)

Ripple vs Output Current

Ripple vs Output Current

	60
	50
(mV)	40
Ripple	30
	20
	10
	0
	0	2	4	6	8

Iout (A)

		70
		60
Vin		50						Vin
	(mV)	40
24.0V
18.0V								18.0V
60.0V	Ripple							24.0V
36.0V								36.0V
48.0V		30
								48.0V
		20						60.0V
		10
		0
		0	1	2	3	4	5	6

Iout (A)

	Ripple vs Output Current
	120
	100
(mV)	80					Vin
						24.0V
						18.0V
Ripple	60					36.0V
						60.0V
						48.0V
	40
	20
	0
	0.0	0.5	1.0	1.5	2.0	2.5

Iout (A)

Power Dissipation vs Output Current

	10
	8
(Watts)					Vin
	6				18.0V
					24.0V
					36.0V
PD	4				48.0V
					60.0V
	2
	0
	0	2	4	6	8

Iout (A)

Power Dissipation vs Output Current

	8
	6						Vin
(Watts)	4
							36.0V
							18.0V
							24.0V
PD							48.0V
							60.0V
	2
	0
	0	1	2	3	4	5	6

Iout (A)

Power Dissipation vs Output Current

	7
	6
	5					Vin
(Watts)						18.0V
	4					24.0V
						36.0V
PD	3					48.0V
						60.0V
	2
	1
	0
	0.0	0.5	1.0	1.5	2.0	2.5

Iout (A)

Safe Operating Area (@Vin=24V)

	90
(°C)	80
Temperature	70
	60
	50
Ambient	40
	30
	20
	0	2	4	6	8

Iout (A)

Airflow

Nat conv

60LF M

120LF M

200LF M

	Safe Operating Area (@Vin=24V)
	90
(°C)	80
	70						Airflow
Temperature
	60						Nat conv
							60LFM
							120LFM
Ambient	50						200LFM
	40
	30
	20
	0	1	2	3	4	5	6
				Iout (A)

Safe Operating Area (@Vin=24V)

	90
(°C)	80
Temperature	70
	60
	50
Ambient	40
	30
	20
	0	0.5	1	1.5	2	2.5

Iout (A)

Airflow

Nat conv

60LF M

120LF M

200LF M

Note 1: All data listed in the above graphs has been developed from actual products tested at 25°C. This data is considered typical data for the DC-DC Converter.

Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 [phone] Fax: [phone] http://www.powertrends.com