DHC2800D SERIES 5W DC-DC CONVERTERS
DHC2812D • DHC2815D
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
FEATURES—DUAL OUTPUT
• BOTH OUTPUTS FULLY REGULATED
• NO DERATING — –55° C TO +125° C
• HIGH ISOLATION — 500V
• TRACKING OUPUT V ADJUSTMENT STANDARD
• REMOTE SHUTDOWN
• 11 – 50V INPUT WITH 5 WATT OUTPUT
Package Dimensions
1" W x 1" L x .35" H
TYPICAL APPLICATION
10nF
8
DHC2800D
5
SET UV
LOCKOUT
SHUTDOWN
OPTO
7
4
1
2
3
6
150K
+V
COMMON
–V
Control
System
DESCRIPTION
The DHC2800D series of DC-DC converters provides the
ruggedness reliability and features required to meet the ad-
vanced design challenges of today's hi-rel market. This has
been accomplished while retaining a power density of 15 W/in
3
and 375 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.
The DHC2800D hybrid converter series utilizes all ceramic
capacitors, surface mount magnetics, and ultrasonically bonded
wires to provide reliable operation at all operating tempera-
tures while surviving G forces of up to 500 G.
The DHC2800D series has two fully regulated tracking
outputs. Standard features include output fault monitoring 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 adjust-
ment / load compensation pin which adjusts both outputs
simultaneously is also standard. However, the DHC2800D
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 +25 V while the shutdown pin will withstand +50 V,
protecting the converters from a variety of system or board
faults e.g. 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 transformer isolated flyback converter topology operating
at a switching frequency of 400 kHz allows operation over a
wide input voltage range. Internal filtering of outputs eliminates
the need for external capacitors 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
PASS
3
7
ERROR AMPLIFIER
REFERENCE AND
ISOLATION
4
EXTERNAL CONNECTIONS
+ OUTPUT
OUTPUT COMMON
– OUTPUT
ADJUST/COMP*
SHUTDOWN PLUS
1
2
3
4
5
6
+ INPUT
TOP
VIEW
7
– INPUT
8
CASE
* Optional N/C on DHC2800D/F
APEX MICROTECHNOLOGY CORPORATION
• TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
DHC2812D • DHC2815D
ABSOLUTE MAXIMUM RATINGS
INPUT VOLTAGE RANGE (Pin 7 to 6 or 5)
INPUT TRANSIENT (Pin 7 to 6)
OUTPUT CURRENT (Continuous)
TEMPERATURE, Storage
TEMPERATURE, Pin Soldering 10s
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
DHC2812D
50Vdc
80V @ 50ms
360mA
4
–65°C, 150°C
300°C
DHC2815D
50Vdc
80V @ 50ms
288mA
4
–65°C, 150°C
300°C
SPECIFICATIONS
PARAMETER
STEADY STATE
CHARACTERISTICS
INPUT VOLTAGE RANGE
OUTPUT VOLTAGE (+/–)
OUTPUT CURRENT –55°C
↔
125°C
OUTPUT POWER –55°C
↔
125°C
EFFICIENCY
LINE REGULATION
LOAD REGULATION
+ (+I
o
= 0 – 160%)
– (-I
o
= 0 – 160%)
OPERATING TEMPERATURE, CASE
TEMPERATURE COEFFICIENT
(Vout +/–)
INPUT RIPPLE CURRENT
WITH 1µH SERIES INDUCTANCE
OUTPUT RIPPLE VOLTAGE
LOAD CAPACITANCE
3
(PER OUTPUT
OVER –55°C
↔
125°C)
SHORT CIRCUIT DISSIPATION
QUIESCENT INPUT CURRENT
INHIBITED
ISOLATION CHARACTERISTICS
(INPUT/OUTPUT/CASE)
LEAKAGE RESISTANCE
LEAKAGE CAPACITANCE
DYNAMIC CHARACTERISTICS
LINE STEP RESPONSE
VOLTAGE CHANGE
RECOVERY TIME (99%)
WITH 50
µF
OUTPUT
CAPACITORS
3
VOLTAGE CHANGE
RECOVERY TIME (99%)
LOAD STEP RESPONSE
VOLTAGE CHANGE
RECOVERY TIME (99%)
WITH 50
µF
OUTPUT
CAPACITORS
3
VOLTAGE CHANGE
RECOVERY TIME (99%)
START-UP OVERSHOOT
SHUTDOWN DELAY
SHUTDOWN RECOVERY
500 Vdc
10kHz
–55°C
↔
125°C
+I
o
= –I
o
= 10%
V
IN
= 16
↔
40
V
IN
= 11
↔
50
V
IN
= 16
↔
40
V
IN
= 11
↔
50
+I
o
= –I
o
= 100%
V
IN
= 11
↔
50; +I
o
= –I
o
= 100%
–I
o
= 40%
2
+I
o
= 40%
2
TEST CONDITIONS
1
DHC2812D
MIN
TYP
MAX
DHC2815D
MIN
TYP
MAX
UNITS
11
11.9
28
12
±225
±208
50
12.1
360
4
333
4
5.4
5
11
14.9
28
15
±180
±167
50
15.1
288
4
267
4
5.4
5
60
64
5
5
20
61
65
5
5
15
Vdc
Vdc
mAdc
mAdc
W
W
%
mV
mV
mV
°C
%/°C
mArms
mArms
mVrms
µF
µF
W
mA
mA
–55
0.006
340
45
15
125
–55
0.006
340
45
15
125
Bandwidth = 10kHz
→
1MHz
Bandwidth = 10kHz
→
1MHz
Bandwidth = 10kHz
→
1MHz
V
IN
= 16
↔
40
V
IN
= 11
↔
50
60
100
50
70
2.5
60
100
50
70
2.5
0.9
0.5
50
1.25
0.09
0.5
50
1.25
100
400
500
100
400
500
MΩ
pF
V
IN
= 16
↔
40 Vdc
200
250
200
250
mV
µS
150
400
+I
o
= –I
o
= 50–100–50%
2
400
200
150
400
400
200
mV
µS
mV
µS
V
IN
= 0
→
28 Vdc
Pin 5 = >10↔ <8 Vdc
Pin 5 = > 8↔ <10Vdc
300
300
0
250
40
500
60
300
300
0
250
40
500
60
mV
µS
mV
µS
mS
APEX MICROTECHNOLOGY CORPORATION
• 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
DHC2812D • DHC2815D
NOTES:
1.
2.
3.
4.
Unless otherwise stated T
C
= 25°, V
IN
= 28V, –I
o
= +I
o
= 100%,
Regulation measured on output pins 1/16" from case. I
o
= 100% means 2.5 or 2.7 watts.
Capacitors should be connected from + to common and – to common only.
Capacitance value imbalance should not be more than 4:1.
Up to 80% of total load may be drawn from either output.
PACKAGE & THERMAL SPECIFICATIONS
WEIGHT
TEMPERATURE RISE, junction to case
TEMPERATURE RISE, ambient
MIN
TYP
14
17
30
MAX
25
UNITS
GRAMS
°C
°C/W
APEX MICROTECHNOLOGY CORPORATION
• TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
DHC2812D
EFFICIENCY CONTOURS
50
INPUT VOLTAGE, V
IN
(V)
INPUT VOLTAGE, V
IN
(V)
40%
50%
TYPICAL PERFORMANCE
GRAPHS
EFFICIENCY CONTOURS
50
40%
50%
EFFICIENCY CONTOURS
50
INPUT VOLTAGE, V
IN
(V)
40%
TEMP = 125°C
TEMP = 25°C
55%
60%
40
40
55%
TEMP =
–55°C
59%
62%
40
50%
55%
58%
30
30
30
60%
62%
63%
63%
65%
20
66%
20
65%
67%
20
10
1
2
3
4
5
OUTPUT POWER, P
OUT
(W)
10
1
2
3
4
5
OUTPUT POWER, P
OUT
(W)
10
1
2
3
4
5
OUTPUT CURRENT, P
OUT
(W)
LOW LINE DROP OUT
OUTPUT RESPONSE, X (UNITS/DIV)
+ LOAD TRANSIENT RESPONSE
OUTPUT RESPONSE, X (UNITS/DIV)
– LOAD TRANSIENT RESPONSE
1V
1V
16
OUTPUT DC CURRENT RATING
+V
OUT
1V
+V
OUT
+LOAD = 90mA
INPUT VOLTAGE, V
IN
(V)
15
14
13
12
11
10
0
–V
OUT
–LOAD = 90mA
–V
OUT
360mA
360mA
2A
+LOAD
90mA
NO OUTPUT BUS CAPCITANCE
TIME, t (100µsec/DIV)
100mA
–LOAD
90mA
NO OUTPUT BUS CAPACITANCE
TIME, t (100µsec/DIV)
1
2
3
4
5
6
OUTPUT CURRENT, P
OUT
(W)
TURN ON THRESHOLD
28
TURN ON VOLTAGE, E
TO
(V)
OUTPUT RESPONSE, X (UNITS/DIV)
20V
500mV 500mV
LINE TRANSIENT RESPONSE
OUTPUT LOAD = 225mA
RESPONSE, X (UNITS/DIV)
10 V
2V
TURN ON RESPONSE
+V
OUT
+12V
OUTPUT LOAD = 225mA
+V
OUT
24
–V
OUT
20
V
IN
40V
16V
+V
OUT
V
IN
28V
0V
–12V
16
12
10K
20K 30K 40K 60K 90K
SET POINT RESISTOR, R
SP
(Ω)
0
AUDIO REJECTION, A
V
(dB)
NO OUTPUT CAPACITANCE
INCLUDES 50µF ON
EACH OUTPUT
TIME, t (100µsec/DIV)
TIME, t (10msec/DIV)
AUDIO REJECTION
V
IN
= 28V
I
OUT
= 225 mA
–20
–40
–60
–80
–100
1K
10K
FREQUENCY, f (Hz)
100K
APEX MICROTECHNOLOGY CORPORATION
• 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
TYPICAL PERFORMANCE
GRAPHS
DHC2815D
EFFICIENCY CONTOURS
40
40%
EFFICIENCY CONTOURS
50
EFFICIENCY CONTOURS
50
INPUT VOLTAGE, V
IN
(V)
INPUT VOLTAGE, V
IN
(V)
40%
40
50%
55%
TEMP = 25°C
35
30
25
20
15
64%
66%
TEMP =
–55°C
INPUT VOLTAGE, V
IN
(V)
50%
55%
60%
40%
40
50%
52%
56%
TEMP =
125°C
30
62%
63%
68%
69%
70%
30
59%
61%
62%
20
65%
66%
20
10
1
71%
10
1
2
3
4
5
OUTPUT CURRENT, P
OUT
(W)
.8
1.6
2.4
3.2
OUTPUT CURRENT, I
OUT
(A)
4
2
3
4
5
OUTPUT CURRENT, P
OUT
(W)
LOW LINE DROP OUT
OUTPUT RESPONSE, X (UNITS/DIV)
16
OUTPUT DC CURRENT RATING
LOAD TRANSIENT RESPONSE
OUTPUT RESPONSE, X (UNITS/DIV)
–LOAD = 72mA
– LOAD TRANSIENT RESPONSE
+V
OUT
+ LOAD = 72mA
INPUT VOLTAGE, V
IN
(V)
1V
14
13
12
11
10
0
–V
OUT
288mA
1V
–V
OUT
288mA
15
–V
OUT
1A
72mA
+LOAD
NO OUTPUT BUS CAPCITANCE
1A
72mA
– LOAD
NO OUTPUT BUS CAPACITANCE
1
2
3
4
5
OUTPUT POWER, P
OUT
(W)
6
TIME, t (100µsec/DIV)
TIME, t (100µsec/DIV)
TURN ON THRESHOLD
28
LINE TRANSIENT RESPONSE
OUTPUT RESPONSE, X (UNITS/DIV)
20V
500mV 500mV
OUTPUT LOAD = 182mA
+V
OUT
–V
OUT
TURN ON RESPONSE
+V
OUT
+15V
TURN ON VOLTAGE, E
TO
(V)
24
RESPONSE, X (UNITS/DIV)
10 V
2V
0V
OUTPUT LOAD =182mA
20
16
V
IN
NO OUTPUT CAPACITANCE
–V
OUT
V
IN
0V
28V
–15V
12
10K
20K 30K 40K50K 70K 90K
SET POINT RESISTOR, R
SP
(Ω)
0
INCLUDES 50µF ON EACHOUTPUT
TIME, t (100µsec/DIV)
TIME, t (10msec/DIV)
AUDIO REJECTION
V
IN
= 28V
I
OUT
= 182mA
AUDIO REJECTION, A
V
(dB)
–20
–40
–60
–80
–100
1K
10K
FREQUENCY, f (Hz)
100K
APEX MICROTECHNOLOGY CORPORATION
• TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
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