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Электронный компонент: MCH2815S/883

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1
+
POSITIVE
INPUT
INHIBIT
FB
SHUTDOWN
PWM
CONTROLLER
INPUT
COMMON
+V
IN
+V
OUT
+
+
DUAL MODELS ONLY
NEGATIVE
OUTPUT
OUTPUT
COMMON
POSITIVE
OUTPUT
3
4
6
1
7
2
0.47
F
typical
MCH SERIES
1.5 WATT
F
EATURES
-55C to +125C operation
12 to 50 VDC input
 Fully isolated
Magnetic feedback
Fixed frequency 370 kHz typ.
Topology Current Mode Flyback
80 V for up to 120 ms transient protection
(70 V for 15 V single and dual models)
Inhibit function
Short circuit protection
Undervoltage lockout
MODELS
VDC O
UTPUT
DESCRIPTION
With a miniature footprint of just 0.8 square inches, the MCH
SeriesTM of DC/DC converters delivers 1.5 watts of output power
while saving significant board real estate. The wide input voltage
range of 12 to 50 VDC accepts the varying voltages of military, aero-
space, or space bus power and tightly regulates output voltages to
protect downstream components. Transient protection of 80 volts for
up to 120 milliseconds exceeds the requirements of MIL-STD-704A
for the 5, 5.2, and 12 volt single models and the 12 volt dual model.
The 15 volt single and dual converters will withstand transients of up
to 70 volts for up to 120 milliseconds.
C
ONVERTER
D
ESIGN
MCH Series DC/DC converters incorporate a continuous flyback
topology with a constant switching frequency of approximately 370
kHz. Current-mode pulse width modulation (PWM) provides output
voltage regulation. Output error voltage is magnetically fed back to
the input side of the PWM to regulate output voltage. Regulation is
also affected by the load; refer to the Electrical Characteristics
tables on the following pages.
Dual models regulate the negative output with magnetic coupling to
the positive output. Up to 80% of the total load may be on one output
providing that the other output carries a minimum of 20% of the total
load. The dual models can be used at double the output voltage by
connecting the load between positive and negative outputs, leaving
the common unconnected. (ex: MCH2805D can be used as a 10
VDC output.)
I
NHIBIT
F
UNCTION
When an open collector TTL logic low is applied to the inhibit
terminal, pin 7, the converter shuts down and lowers the output
voltage to near zero and input current to as low as 2.3 mA. Leaving
the terminal open or applying an open collector TTL logic high will
enable the converter.
P
ROTECTION
F
EATURES
Undervoltage lockout prevents the MCH Series converters from
operating below approximately 8 VDC input voltage to keep system
current levels smooth, especially during initialization or re-start oper-
ations. All models include a soft-start function to prevent large
current draw and minimize overshoot. The converters also provide
short circuit protection by restricting the current.
MIL-STD-461
Use Interpoint's FMSA-461 EMI filter to pass the CE03 requirements
of MIL-STD-461C.
C
ONVENIENT
P
ACKAGING
The MCH Series converters are packaged in hermetically sealed,
projection-welded metal cases which provide EMI/RFI shielding.
SINGLES
5
5.2
12
15
DUALS
5
12
15
DC/DC C
ONVERTERS
28 V
OLT
I
NPUT
F
IGURE
1: B
LOCK
D
IAGRAM
Size (max.): 0.980 x 0.805 x 0.270 inches (24.89 x 20.45 x 6.86 mm)
Weight:
12 grams max.
Screening:
Standard, ES, or 883 (Class H)
TYPICAL CHARACTERISTICS
RECOMMENDED OPERATING CONDITIONS
ABSOLUTE MAXIMUM RATINGS
INHIBIT
2
MCH SERIES
1.5 WATT
DC/DC C
ONVERTERS
SINGLE OUTPUT MODELS
MCH2805S
MCH285R2S
MCH2812S
MCH2815S
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP MAX
MIN
TYP
MAX
MIN
TYP MAX
UNITS
OUTPUT VOLTAGE
1
Tc = 25C
4.95
5
5.05
5.15
5.2
5.25 11.88
12
12.12 14.85
15
15.15
VDC
Tc = 55C TO +125C
4.80
5
5.20
5.00
5.2
5.40 11.52
12
12.48 14.40
15
15.60
OUTPUT CURRENT
V
IN
= 12 to 50 VDC
--
300
0
--
288
0
--
125
0
--
100
mA
OUTPUT POWER
V
IN
= 12 TO 50 VDC
0
--
1.5
0
--
1.5
0
--
1.5
0
--
1.5
W
OUTPUT RIPPLE
10 kHz - 2 MHz
--
45
150
--
45
150
--
50
200
--
35
150
mV p-p
VOLTAGE
Tc = 55C TO +125C
--
65
300
--
65
300
--
70
300
--
50
250
LINE REGULATION
V
IN
= 12 TO 50 VDC
--
35
100
--
35
100
--
60
200
--
70
300
mV
Tc = 55C TO +125C
--
40
120
--
40
120
--
70
250
--
80
350
LOAD REGULATION
10% TO FULL LOAD
--
350
700
--
350
700
--
600
1300
--
700
1500
Tc = 55C TO +125C
--
380
800
--
380
800
--
640
1400
--
760
1600
mV
50% TO FULL
--
100
200
--
100
200
--
145
300
--
165
350
Tc = 55C TO +125C
--
115
300
--
115
300
--
160
400
--
185
450
INPUT VOLTAGE
CONTINUOUS
12
28
50
12
28
50
12
28
50
12
28
50
VDC
NO LOAD TO FULL
TRANSIENT 120 ms
0
--
80
0
--
80
0
--
80
0
--
70
V
INPUT CURRENT
NO LOAD
--
5.5
10
--
5.5
10
--
6.0
10
--
6.0
11
Tc = 55C TO +125C
--
6.0
11
--
6.0
11
--
6.5
12
--
6.5
12
FULL LOAD
--
70
74
--
70
74
--
68
72
--
68
72
mA
Tc = 55C TO +125C
--
73
78
--
73
78
--
70
74
--
70
74
INHIBITED
--
2.3
3.2
--
2.3
3.2
--
2.3
3.2
--
2.3
3.2
Tc = 55C TO +125C
--
2.4
3.5
--
2.4
3.5
--
2.4
3.5
--
2.4
3.5
INPUT RIPPLE
10k Hz - 10 MHz
--
100
200
--
100
200
--
100
200
--
100
200
mA p-p
CURRENT
2
Tc = 55C TO +125C
--
130
250
--
130
250
--
150
250
--
150
250
EFFICIENCY
Tc = 25C
72
77
--
72
77
--
74
79
--
74
79
--
%
Tc = 55C TO +125C
69
75
--
69
75
--
72
77
--
72
77
--
LOAD FAULT
3, 4
POWER DISSIPATION
--
1.3
2.0
--
1.3
2.0
--
2.0
3.2
--
2.3
3.7
W
Tc = 55C TO +125C
--
1.4
2.3
--
1.4
2.3
--
2.2
3.5
--
2.5
4.0
RECOVERY
--
3.0
12
--
3.0
12
--
3.5
15
--
4.0
18
ms
Tc = -55C TO +125C
--
3.5
15
--
3.5
15
--
3.5
20
--
4.0
20
STEP LOAD
50 %100% 50% LOAD
RESPONSE
5
TRANSIENT
400
185
400
400
185
400
700
350
700
700
350
700
mV pk
Tc = 55C TO +125C
500
185
500
500
185
500
800
380
800
800
380
800
RECOVERY
--
125
500
--
125
500
--
130
500
--
140
600
s
Tc =55C TO +125C
--
125
600
--
125
600
--
130
600
--
180
750
STEP LINE
12 TO 50 TO 12 V
IN
RESPONSE
5
TRANSIENT
400
170
400
400
170
400
900
400
900
750
400
750
mV pk
Tc = 55C TO +125C
500
180
500
500
180
500 1000 400
1000 850
450
850
RECOVERY
--
0.75
3.0
--
0.75
3.0
--
0.6
2.5
--
0.47
2.0
ms
Tc = 55C TO +125C
--
0.75
4.0
--
0.75
4.0
--
0.6
3.0
--
0.5
2.5
START-UP
DELAY
--
7
20
--
7
20
--
7
20
--
7
20
ms
0 TO 28 VDC
Tc = 55C TO +125C
--
10
40
--
10
40
--
10
40
--
10
40
OVERSHOOT
--
0
100
--
0
100
--
0
250
--
0
300
mV pk
Tc = 55C TO +125C
--
0
150
--
0
150
--
0
350
--
0
450
Input Voltage
12 to 50 VDC
Output Power
1.5 W
Capacitive Load
Single output models 200 F
Dual output models 100 F
Lead Soldering Temperature (10 sec per lead)
300C
Storage Temperature Range (Case)
65C to +150C
Input Voltage Range
12 to 50 VDC continuous
80 V for 120 msec transient
(70 V for 15 V single and dual models)
Case Operating Temperature (Tc)
55C to +125C full power
55C to +135C absolute
Derating Output Power/Current (Tc)
Linearly from 100% at 125C to 0% at 135C
Inhibit TTL Open Collector
Logic low (output disabled) 0.8 V max
Inhibit pin current 1 mA max
Referenced to input common
Logic high (output enabled) open collector
See notes 1, 2, 3, 4, 5, and 6 on the following page.
Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
Output Voltage Temperature Coefficient
100 ppm/C typical
Input to Output Capacitance
100 to 170 pF typical
Undervoltage Lockout
8 V input typical
Current Limit
125% of full load typical
Isolation
100 megohm minimum at 500 V
Audio Rejection 40 dB, typical
Conversion Frequency (kHz)
25C, 300 min, 370 typ, 450 max
55C to +125C
270 min, 370 typ, 470 max
Inhibit Pin Voltage (unit enabled)
7 to 12 V
3
MCH SERIES
1.5 WATT
DC/DC C
ONVERTERS
Notes:
1. Specified at 50% load.
2. Lin = 2 H.
3. Maximum duration of short circuit: 25C- 90 seconds, 125C 30 seconds.
4. Load fault is a short circuit (<50 mohms). Recovery is into resistive full load.
5. Transition
10 s. Recovery = time to settle to within 1% of Vout final value.
6. Max. spec indicates 80% of the converter's total power, available from either
output.
7. Specification applies to both + and Vout.
8. Although no minimum load is required, at no load the output voltage may
increase up to 15%.
DUAL OUTPUT MODELS
MCH2805D
MCH2812D
MCH2815D
PARAMETER
CONDITIONS
MIN TYP MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
OUTPUT VOLTAGE
1
Tc = 25C
4.95
5
5.05
11.88
12
12.12 14.85
15
15.15
VDC
Tc = 55C TO +125C
4.80
5
5.20
11.52
12
12.48
14.40
15
15.60
OUTPUT CURRENT
6
V
IN
= 12 TO 50 VDC
0
150
240
0
62.5
100
0
50
80
mA
OUTPUT POWER
V
IN
= 12 TO 50 VDC
0
--
1.5
0
--
1.5
0
--
1.5
W
OUTPUT RIPPLE
10 kHz - 2 MHz
--
35
150
--
35
150
--
30
150
VOLTAGE +V
OUT
Tc = 55C TO +125C
--
50
250
--
40
250
--
35
250
mV p-p
V
OUT
10 kHz - 2 MHz
--
35
150
--
35
150
--
30
150
Tc = 55C TO +125C
--
50
250
--
40
250
--
35
250
LINE REGULATION
7
V
IN
= 12 TO 50 VDC
--
10
50
--
100
300
--
165
500
mV
Tc = 55C TO +125C
--
20
100
--
110
400
--
180
650
LOAD REGULATION
8
10% TO FULL
--
300
600
--
550
1100
--
600
1300
V
OUT
55C TO +125C
--
350
700
--
570
1200
--
630
1400
mV
50% TO FULL
--
80
200
--
115
250
--
125
300
55C TO +125C
--
100
300
--
130
350
--
135
400
INPUT VOLTAGE
CONTINUOUS
12
28
50
12
28
50
12
28
50
VDC
NO LOAD TO FULL
TRANSIENT 120 ms
0
--
80
0
--
80
0
--
70
V
INPUT CURRENT
NO LOAD
--
5.0
10
--
7.5
13
--
7.5
13
Tc = 55C TO +125C
--
6.0
12
--
8.0
14
--
8.0
14
FULL LOAD
--
69
73
--
70
73
--
71
74
mA
Tc = 55C TO +125C
--
72
77
--
71
77
--
72
78
INHIBITED
--
2.3
3.2
--
2.3
3.2
--
2.3
3.2
Tc = 55C TO +125C
--
2.4
3.5
--
2.4
3.5
--
2.4
3.5
INPUT RIPPLE
2
10 kHz - 10 MHz
--
100
200
--
115
200
--
90
200
mA p-p
CURRENT
Tc = 55C TO +125C
--
130
250
--
150
250
--
120
250
EFFICIENCY
Tc = 25C
73
77
--
73
77
--
72
76
--
%
Tc = 55C TO +125C
70
75
--
70
75
--
69
74
--
LOAD FAULT
3,4
POWER DISSIPATION
--
1.4
2.2
--
2.5
3.8
--
2.7
4.1
W
Tc = 55C TO +125C
--
1.6
2.5
--
2.7
4.2
--
3.0
4.5
RECOVERY
--
3.7
15
--
3.2
15
--
4.0
15
ms
Tc = 55C TO +125C
--
3.8
20
--
3.2
20
--
4.0
20
STEP LOAD
50 %100% 50% LOAD
RESPONSE
5
V
OUT
TRANSIENT
300
130
300
600
250
600
600
250
600
mV pk
Tc = 55C TO +125C
400
140
400
700
260
700
700
270
700
RECOVERY
--
100
400
--
165
700
--
50
200
s
55C TO +125C
--
100
500
--
165
800
--
50
300
STEP LINE
12 TO 50 TO 12 V
IN
RESPONSE
5
V
OUT
TRANSIENT
250
125
250
500
240
500
500
220
500
mV pk
Tc = 55C TO +125C
300
130
300
600
250
600
600
230
600
RECOVERY
--
0.6
2.5
--
0.9
3.0
--
0.6
3.0
ms
Tc = 55C TO +125C
--
0.6
3.0
--
0.9
4.0
--
0.7
4.0
STARTUP
DELAY
--
8
25
--
8
25
--
8
25
ms
0 TO 28 VDC, V
OUT
Tc = 55C TO +125C
--
10
45
--
10
45
--
10
45
OVERSHOOT
--
0
100
--
0
250
--
0
750
mV pk
Tc = 55C TO +125C
--
0
150
--
0
350
--
0
900
Electrical Characteristics: 25C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
MCH 28 12 D / 883
Base Model
Input Voltage
Output Voltage
Screening
Number of Outputs
(S = single, D = dual)
(R = decimal point, 3R3 = 3.3 Vout)
(Standard screening has no designator
in this position.)
PIN OUT
SMD NUMBERS
4
MCH SERIES
1.5 WATT
DC/DC C
ONVERTERS
Pin
Single Output
Dual Output
1
Positive Input
Positive Input
2
Input Common
Input Common
3
Positive Output
Positive Output
4
Output Common
Output Common
5
Case Ground
Case Ground
6
No connection
Negative Output
7
Inhibit
Inhibit
MODEL NUMBERING KEY
F
IGURE
2: P
IN
O
UT
S
TANDARD
M
ICROCIRCUIT
D
RAWING
(SMD)
5962-9569601HXC
IN PROCESS
5962-9569701HXC
5962-9569801HXC
5962-9570201HXC
5962-9570301HXC
5962-9570401HXC
MCH S
ERIES
S
IMILAR
P
ART
MCH2805S/883
MCH285R2S/883
MCH2812S/883
MCH2815S/883
MCH2805D/883
MCH2812D/883
MCH2815D/883
Squared corner and dot on
top of cover indicate pin one.
1
4
7
5
2
3
6
For exact specifications for an SMD product, refer to the SMD
drawing. Call your Interpoint representative for status on the MCH
Series SMD releases which are "in process". SMDs can be down-
loaded from
http://www.dscccols.com/programs/smcr
See page 7 for dimensions.
DC/DC C
ONVERTERS
5
MCH SERIES
1.5 WATT
LOAD TRANSIENT RESPONSE
200 mV / div.
500
s / div.
MCH2815D
+V
OUT
FULL LOAD TO HALF LOAD
+V
OUT
HALF LOAD TO FULL LOAD
V
OUT
FULL LOAD TO HALF LOAD
V
OUT
HALF LOAD TO FULL LOAD
V
IN
LINE TRANSIENT RESPONSE
200 mV / div.
200
s / div.
20 V / div.
+V
OUT
MCH2815D
V
OUT
12 VDC
50 VDC
2V/div.
V
IN
20V/div.
V
OUT
TURN-ON INTO FULL LOAD
0
2
4
6
8
10
12
14
16
18
TIME (ms)
MCH2805S
Representative of all 5 volt models
F
IGURE
9
F
IGURE
10
F
IGURE
11
TYPICAL PERFORMANCE CURVES: Tc = 25C, full load, Vin = 28 VDC, unless otherwise specified.
F
IGURE
3
F
IGURE
4
F
IGURE
5
F
IGURE
6
F
IGURE
7
F
IGURE
8
EFFICIENCY vs LOAD
1.75
EFFICIENCY
30
80
40
50
60
70
0
0.25
0.5
0.75
1
1.25
1.5
OUTPUT POWER
12 & 15 VOLT SINGLE MODELS
12 VOLT
28 VOLT
50 VOLT
90
EFFICIENCY vs LOAD
1.75
EFFICIENCY
30
80
40
50
60
70
0
0.25
0.5
0.75
1
1.25
1.5
OUTPUT POWER
12 & 15 VOLT DUAL MODELS
12 VOLT
28 VOLT
50 VOLT
90
EFFICIENCY vs LOAD
1.75
90
EFFICIENCY
30
80
40
50
60
70
0
0.25
0.5
0.75
1
1.25
1.5
OUTPUT POWER
ALL 5 VOLT MODELS
12 VOLT
28 VOLT
50 VOLT
1
0
20
40
60
80
100
ATTENUATION (dB)
AUDIO REJECTION
10
60
FREQUENCY (kHz)
MCH2815S - Representative of all models
V
IN
LINE TRANSIENT RESPONSE
100 mV / div.
200
s / div.
20 V / div.
V
OUT
MCH2805S
12 VDC
50 VDC
LOAD TRANSIENT RESPONSE
100 mV / div.
500
s / div.
MCH2805S
FULL LOAD TO HALF LOAD
HALF LOAD TO FULL LOAD