DHC2800S SERIES 5W/6W DC-DC CONVERTERS
DHC2803S • DHC2805S
M I C R O T E C H N O L O G Y
HTTP://WWW.APEXMICROTECH.COM
(800) 546-APEX
(800) 546-2739
HI-REL DESIGN
•
•
•
•
WAVE SOLDERABLE PACKAGE
ALL CERAMIC CAPACITORS
SURFACE MOUNT MAGNETICS
WITHSTANDS 5000G
FEATURES—SINGLE OUTPUT
•
•
•
•
•
•
•
NO DERATING — –55° C to +125° C
WIDE SUPPLY RANGE — 12V to 50V
HIGH ISOLATION — 500V
HIGH POWER DENSITY — 17W/IN
3
OUTPUT VOLTAGE ADJUSTMENT STANDARD
REMOTE SHUTDOWN
OPERATES TO 11V
IN
AT 5W
Package Dimensions
1" W x 1" L x .35" H
B
TYPICAL APPLICATION WITH OPTIONS
10nF
8
DHC2800S
5
SET UV
LOCKOUT
SHUTDOWN
OPTO
7
3
1
2
6
50K
+V
–V
Control
System
DESCRIPTION
The DHC2800S series of DC-DC converters provides the
ruggedness, reliability, and features required to meet the
advanced design challenges of today’s hi-rel market. This is
accomplished while retaining a power density of 17 W/in
3
and
425 mW/gram of power/package performance. The use of
advanced substrate and reflow soldering techniques during
construction results in a rugged, cost-effective, and completely
solderable package.
DHC2800S hybrid converter series utilizes all ceramic ca-
pacitors and surface mount magnetics to provide reliable
operation at all operating temperatures while surviving very
high G forces.
DHC2800S standard features include output fault monitor-
ing and/or turn on voltage point programming via the shutdown
pin. All three functions may be implemented simultaneously
with a minimum of external components. An output voltage
adjustment / load compensation pin is also standard however
DHC2800S may be ordered without this feature (/F option).
Fault tolerant design protects these converters from most
external circuit faults. The output and output adjust pins will
withstand +35 V while the shutdown pin will withstand +50 V
protecting the converters from a variety of system or board
faults i.e. solder bridges etc. Unique load fault protection
circuitry allows this converter to pull up loads having difficult
static load line characteristics and allows short term load
excursions significantly beyond ratings in most applications.
A resonant reset transformer isolated forward converter
topology operating at a switching frequency of 400 kHZ allows
operation over a wide input voltage range. Internal filtering of
both input and output eliminates the need for external capaci-
tors in many applications.
The 8-pin DIP package (see Package Outlines) is hermeti-
cally sealed and isolated from the internal circuits. Heat sinking
is recommended for full power operation at elevated ambient
temperatures.
V
TRIM
R
SP
200K
+5V
5K
J174
V
IN
OPERATION
NORMAL
(TTL)
BLOCK DIAGRAM
6
1
2
5
PWM
FEED FORWARD
CONTROLLER
7
ERROR AMPLIFIER
REFERENCE AND
ISOLATION
3
EXTERNAL CONNECTIONS
+ OUTPUT
– OUTPUT
ADJUST/COMP*
NO CONNECTION
SHUTDOWN PLUS
1
2
3
4
5
6
+ INPUT
TOP
VIEW
7
– INPUT
8
CASE
* Optional N/C on DHC2800S/F
APEX MICROTECHNOLOGY CORPORATION
• TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
41
DHC2803S • DHC2805S
ABSOLUTE MAXIMUM RATINGS
INPUT VOLTAGE RANGE (Pin 7 to 6 or 5)
INPUT TRANSIENT (Pin 7 to 6)
OUTPUT WITHSTAND (Pin 2 to 1 or 3)
OUTPUT CURRENT (Continuous)
TEMPERATURE, Storage
TEMPERATURE, Pin Soldering 10s
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
DHC2803S
0 – 50Vdc
80V @ 50ms
35Vdc
2Adc
5
–65°C, 150°C
300°C
DHC2805S
0-50Vdc
80V @ 50ms
35Vdc
1.2Adc
–65°C, 150°C
300°C
SPECIFICATIONS
PARAMETER
STEADY STATE
CHARACTERISTICS
INPUT VOLTAGE RANGE
OUTPUT VOLTAGE
OUTPUT CURRENT
EFFICIENCY
OUTPUT RIPPLE VOLTAGE
INPUT RIPPLE CURRENT
OUTPUT POWER
2
LINE REGULATION
LOAD REGULATION
TEMPERATURE COEFFICIENT
TEMPERATURE RANGE, case
2
QUIESCENT CURRENT
INHIBITED
ISOLATION CHARACTERISTICS
(input/output/case)
LEAKAGE RESISTANCE
LEAKAGE CAPACITANCE
DYNAMIC CHARACTERISTICS
LINE STEP RESPONSE
VOLTAGE CHANGE
RECOVERY TIME (95%)
LOAD STEP RESPONSE
VOLTAGE CHANGE
RECOVERY TIME (95%)
DYNAMIC CHARACTERISTICS
START-UP OVERSHOOT
SHUTDOWN DELAY
SHUTDOWN RECOVERY TIME
4
NOTES:
1.
2.
3.
4.
5.
6.
V
IN
; 0-50 Vdc
V
PIN5
; > 10Vdc
→
<8Vdc
V
PIN5
; < 8Vdc
→
> 10Vdc
V
IN
; T
R
, T
F
= 10µs
V
IN
; 16
↔
40 Vdc
I
OUT
; T
R
, T
F
= 10µs
I
OUT
; 50%
↔
max Adc
V
IN
; min
↔
max Vdc @ I
MIN
V
IN
; min
↔
max Vdc
V
IN
; 13
↔
max Vdc
Bandwidth 10kHz
↔
1MHz
Bandwidth 10kHz
↔
1MHz
V
IN
; min
↔
max
I
OUT
; min
↔
max
3
3
DHC2803S
TEST CONDITIONS
1
MIN
TYP
MAX
MIN
DHC2805S
TYP
MAX
UNITS
12
3.2
180
61
28
3.3
50
3.4
1520
1820
5
80
100
5.0
6
15
25
125
45
2.5
12
5.00
120
64
28
5.05
50
5.1
1200
Vdc
Vdc
mAdc
mAdc
%
mVrms
mArms
W
mVdc
mVdc
%/°C
°C
mAdc
mAdc
66
38
30
6
10
.006
69
30
30
6
10
.006
80
100
6.0
15
25
125
45
2.5
.5
.6
–55
I
OUT
= 0A
Vpin5; < 8Vdc
.09
38
1.25
–55
.09
38
1.25
V
TEST
= 500Vdc
f = 10kHz
100
55
100
60
MΩ
pF
350
30
700
30
300
30
700
40
mV
µs
mV
µs
0
220
400
500
60
0
220
400
500
60
mV
µs
ms
Unless otherwise stated: T
C
= 25°C, V
IN
= 28V, I
OUT
= I
OUT
MAX.
Derate power linearly to zero from 125°C to 135°C.
Regulation measured between pin 1 and pin 2 1/6" from case.
Recovery spec assumes that converter has been OFF for at least 500ms.
DHC2803S I
OUT MAX
= 2.0ADC when voltage is adjusted to 3.0Vdc, V
IN
= 13-50Vdc, AND C
LOAD
≥
100µF.
DHC2803S P
OUT MAX
= 6W when V
IN
= 13-50Vdc
The internal substrate contains beryllia (BeO). Do not break the seal. If accidentally broken, do not crush, machine, or
subject to temperatures in excess of 850°C to avoid generating toxic fumes.
MIN
TYP
30
10
MAX
15
UNITS
°C/W
°C
CAUTION
CAUTION:
PACKAGE THERMAL SPECIFICATIONS
RESISTANCE, case to air
TEMPERATURE RISE, junction to case
APEX MICROTECHNOLOGY CORPORATION
• 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
42
TYPICAL PERFORMANCE
GRAPHS
DHC2803S
EFFICIENCY CONTOURS
50
30%
EFFICIENCY CONTOURS
50
INPUT VOLTAGE, V
IN
(V)
30%
EFFICIENCY CONTOURS
50
INPUT VOLTAGE, V
IN
(V)
30%
40%
INPUT VOLTAGE, V
IN
(V)
40%
TEMP = 25°C
50%
55%
60%
TEMP = –55°C
40%
50%
55%
TEMP =
125°C
50%
55%
60%
62%
40
40
40
30
63%
65%
67%
30
60%
63%
65%
30
64%
B
20
70%
68%
69%
20
66%
67%
68%
20
66%
67%
65%
11
.18 .36
.72
1.08
1.44
1.8
OUTPUT CURRENT, I
OUT
(A)
68%
11
.18 .36
.72
1.08
1.44
1.8
OUTPUT CURRENT, I
OUT
(A)
11
.18 .36
.72
1.08
1.44
1.8
OUTPUT CURRENT, I
OUT
(A)
LOW LINE DROP OUT
OUTPUT RESPONSE, X (UNITS/DIV)
1V
14
1.8A
500mA
1V
V
OUT
OUTPUT RESPONSE, X (UNITS/DIV)
16
OUTPUT DC
CURRENT RATING
LOAD TRANSIENT RESPONSE
LOAD TRANSIENT RESPONSE 100µF
INPUT VOLTAGE, V
IN
(V)
V
OUT
1.8A
500mA
12
.9A
I
OUT
NO OUTPUT BUS CAPCITANCE
.9A
I
OUT
INCLUDES 100µF ON OUTPUT BUS
10
0.0
0.5
1.0
1.5
2.0
OUTPUT CURRENT, I
OUT
(A)
TIME, t (100µsec/DIV)
TIME, t (200µsec/DIV)
LOAD TRANSIENT RESPONSE 1000µF
OUTPUT RESPONSE, X (UNITS/DIV)
OUTPUT RESPONSE, X (UNITS/DIV)
10V
50mV
LINE TRANSIENT RESPONSE
OUTPUT RESPONSE, X (UNITS/DIV)
LINE TRANSIENT RESPONSE
100mV
1V
V
OUT
V
OUT
V
OUT
1.8A
500mA
40V
80V
.9A
I
OUT
INCLUDES 1000µF ON OUTPUT BUS
V
IN
16V
TIME, t (500µsec/DIV)
TIME, t (200µsec/DIV)
20V
V
IN
11V
TIME, t (200µsec/DIV)
TURN ON THRESHOLD
28
TURN ON VOLTAGE, E
TO
(V)
RESPONSE, X (UNITS/DIV)
10 V
1V
TURN ON RESPONSE
0
LOAD 1.8A
3.3V
AUDIO REJECTION, A
V
(dB)
AUDIO REJECTION
V
IN
= 28V
I
OUT
= 2.0A
–20
–40
–60
–80
24
V
OUT
0V
28V
20
16
12
10K
20K 30K 40K 60K 90K
SET POINT RESISTOR, R
SP
(Ω)
0V V
IN
INCLUDES 100µF ON
OUTPUT BUS
TIME, t (5msec/DIV)
–100
100 200 400 1K 2K 4K 10K 20K 40K 100K
FREQUENCY, f (Hz)
APEX MICROTECHNOLOGY CORPORATION
• TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
43
DHC2805S
EFFICIENCY CONTOURS
50
INPUT VOLTAGE, V
IN
(V)
30%
TYPICAL PERFORMANCE
GRAPHS
EFFICIENCY CONTOURS
50
30%
EFFICIENCY CONTOURS
50
INPUT VOLTAGE, V
IN
(V)
30%
40%
INPUT VOLTAGE, V
IN
(V)
40%
TEMP = 25°C
50%
55%
60%
TEMP = –55°C
40%
50%
55%
40
40
40
50%
55%
60%
TEMP =
125°C
30
63%
65%
68%
30
60%
63%
66%
30
66%
20
72%
70%
71%
20
68%
69%
70%
20
68%
69%
70%
11
.12 .24
.48
.78
.96
1.2
OUTPUT CURRENT, I
OUT
(A)
11
.12 .24
.48
.78
.96
1.2
OUTPUT CURRENT, I
OUT
(A)
11
.12 .24
.48
.78
.96
1.2
OUTPUT CURRENT, I
OUT
(A)
LOW LINE DROP OUT
OUTPUT RESPONSE, X (UNITS/DIV)
TEMP = 25°C
INPUT VOLTAGE, V
IN
(V)
1V
14
12
1.2A
500mA
1V
V
OUT
OUTPUT RESPONSE, X (UNITS/DIV)
16
OUTPUT DC
CURRENT RATING
LOAD TRANSIENT RESPONSE
LOAD TRANSIENT RESPONSE 100µF
V
OUT
1.2A
500mA
I
OUT
600mA
I
OUT
600mA
10
0.0
NO OUTPUT BUS CAPCITANCE
INCLUDES 100µF ON OUTPUT BUS
0.4
0.8
1.2
1.6
OUTPUT CURRENT, I
OUT
(A)
TIME, t (100µsec/DIV)
TIME, t (200µsec/DIV)
LOAD TRANSIENT RESPONSE 1000µF
OUTPUT RESPONSE, X (UNITS/DIV)
OUTPUT RESPONSE, X (UNITS/DIV)
10V
50mV
LINE TRANSIENT RESPONSE
OUTPUT RESPONSE, X (UNITS/DIV)
LINE TRANSIENT RESPONSE
INCLUDES 100µF ON OUTPUT BUS
LOAD = 1.2A
V
OUT
1V
V
OUT
100mV
V
OUT
80V
LOAD = 1.2A
40V
1.2A
500mA
I
OUT
600mA
16V
V
IN
INCLUDES 100µF ON OUTPUT BUS
INCLUDES 1000µF ON OUTPUT BUS
TIME, t (500µsec/DIV)
TIME, t (200µsec/DIV)
20V
V
IN
11V
TIME, t (200µsec/DIV)
TURN ON THRESHOLD
28
TURN ON VOLTAGE, E
TO
(V)
RESPONSE, X (UNITS/DIV)
10 V
2V
TURN ON RESPONSE
0
LOAD = 1.2A
5.0V
V
OUT
0V
28V
AUDIO REJECTION, A
V
(dB)
AUDIO REJECTION
V
IN
= 28V
I
OUT
= 1.2A
–20
–40
–60
–80
24
20
16
0V V
IN
INCLUDES 100µF ON OUTPUT BUS
12
10K
20K 30K 40K 60K 90K
SET POINT RESISTOR, R
SP
(Ω)
TIME, t (5msec/DIV)
–100
100 200 400 1K 2K
10K 20K
FREQUENCY, f (Hz)
100K
APEX MICROTECHNOLOGY CORPORATION
• 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
44
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