ST STPS1L40-Y User Manual

STPS1L40-Y

Automotive low drop power Schottky rectifier

Features

■Very small conduction losses

■Negligible switching losses

■Low forward voltage drop

■Surface mount miniature packages

■Avalanche capability specified

■AEC-Q101 qualified

■ECOPACK®2 compliant components

Description

Single chip Schottky rectifiers suited to switched mode power supplies and high frequency DC to DC converters.

Packaged in SMA and SMB this device is especially intended for surface mounting and used in low voltage, high frequency inverters, free wheeling and polarity protection in automotive applications.

		A			A
K			K
	SMA				SMB
(JEDEC DO-214AC)			(JEDEC DO-214AA)
STPS1L40AY			STPS1L40UY

Table 1.	Device summary
	Symbol		Value
	IF(AV)		1 A
	VRRM		40 V
	Tj (max)		150 °C
	VF(max)		0.42 V

October 2011

Doc ID 18247 Rev 1

1/9

www.st.com

Characteristics

STPS1L40-Y

1

Characteristics

Table 2.

Absolute ratings (limiting values)

Symbol

Parameter

Value

Unit

VRRM

Repetitive peak reverse voltage

40

V

IF(RMS)

Forward rms current

8

A

IF(AV)

Average forward current

TL = 130 °C δ = 0.5

1

A

IFSM

Surge non repetitive forward current

tp = 10 ms sinusoidal

60

A

IRRM

Repetitive peak reverse current

tp = 2 µs

F = 1 kHz square

1

A

IRSM

Non repetitive peak reverse current

tp = 100 µs square

1

A

PARM

Repetitive peak avalanche power

tp = 1 µs

Tj = 25 °C

900

W

Tstg

Storage temperature range

- 65 to + 150

°C

Tj

Operating junction temperature range(1)

-40 to + 150

°C

dV/dt

Critical rate of rise of reverse voltage

10000

V/µs

1.

dPtot <

1

condition to avoid thermal runaway for a diode on its own heatsink

Rth(j-a)

dTj

Table 3.

Thermal resistance

Symbol

Parameter

Value

Unit

Rth(j-l)

Junction to lead

SMA

30

°C/W

SMB

25

Table 4.

Static electrical characteristics

Symbol

Parameter

Tests conditions

Min.

Typ.

Max.

Unit

IR (1)

Reverse leakage current

Tj = 25 °C

VR = VRRM

-

-

35

µA

Tj = 125 °C

-

6

10

mA

Tj = 25 °C

IF = 1 A

-

-

0.5

V

(1)

Forward voltage drop

Tj = 125 °C

-

0.37

0.42

V

F

Tj = 25 °C

-

-

0.63

IF = 2 A

Tj = 125 °C

-

0.5

0.61

1. Pulse test: tp = 380 µs, δ < 2%

To evaluate the conduction losses use the following equation:

P = 0.23 x IF(AV) + 0.19 IF2(RMS)

2/9	Doc ID 18247 Rev 1

STPS1L40-Y	Characteristics
Figure 1. Average forward power dissipation Figure 2.	Average forward current versus
versus average forward current	ambient temperature (SMA, δ = 0.5)

0.8

PF(AV)(W)

0.7

δ

= 0.1

δ =

0.2

δ = 0.5

δ = 1

δ = 0.05

0.6

0.5

0.4

0.3

0.2							T
0.1				IF(AV)(A)		δ = tp / T		tp
0.0
0.0	0.2	0.4	0.6	0.8	1.0	1.2	1.4	1.6

IF(AV)(A)
1.2							SMA
				Rth(j-a) = Rth(j-l)
1.0
0.8
0.6				Rth(j-a) = 120 °C/W
0.4
0.2	T
	δ = tp / T	t	p		T		(°C)
0.0					amb
0	25		50	75	100	125		150

Figure 3. Average forward current versus

Figure 4. Normalized avalanche power

ambient temperature (SMB, δ = 0.5)

derating versus pulse duration

1.2

IF(AV)(A)

PARM(tp)

SMB

PARM(1 µs)

1.0

Rth(j-a) = Rth(j-l)

1

0.8

0.1

0.6

Rth(j-

a) = 100 °C/W

0.4							0.01
	T
0.2
0.0	δ = tp / T	tp		Tamb(°C)			0.001			tp(µs)
0	25	50	75	100	125	150	0.01	0.1	1	10	100	1000

Figure 5. Normalized avalanche power	Figure 6. Non repetitive surge peak forward
derating versus junction	current versus overload duration
temperature	(maximum values, SMA)

	PARM(Tj)					IM(A)
PARM(25 °C)						7
										SMA
1.2
						6
1						5
0.8						4			Ta = 25 °C
0.6						3				Ta = 75 °C
0.4						2			Ta = 125 °C
0.2						IM
			Tj(°C)			1	t	t(s)
0						0	δ = 0.5
25	50	75	100	125	150	1.E-04	1.E-03	1.E-02	1.E-01	1.E+00

Doc ID 18247 Rev 1

3/9