VX78-1000 Series Datasheet by CUI Inc.

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Product Page 3D Model PCB Faalgnnl A \vcunNcE “as cflus C e XX /7\ Number
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date 05/18/2017
page 1 of 8
SERIES: VX78-1000 DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR
FEATURES
• wide input
• pin-out compatible with linear regulators
• encapsulated
• UL & CSA approved
• high efficiency up to 96%
• no-load input current as low as 0.2 mA
• wide operating temp: -40°C to +85°C
• supports negative output
• short circuit protection on the output
MODEL input
voltage1
output
voltage
output
current
output
power
ripple
& noise2
efficiency3
typ
(Vdc)
range
(Vdc) (Vdc)
max
(mA)
max
(W)
max
(mVp-p)
typ
(%)
VX7803-1000 24 6~36 3.3 1000 3.3 75 90
VX7805-1000 24
12
8~36
8~27
5
-5
1000
-500
5
2.5
75
75
93
86
VX78039-1000 24 13~36 9 1000 9 75 95
VX78012-1000 24
12
16~36
8~20
12
-12
1000
-300
12
3.6
75
75
96
89
VX7815-1000 24
12
20~36
8~18
15
-15
1000
-300
15
4.5
75
75
96
89
Notes: 1. For input voltages higher than 30 Vdc, a 22 µF / 50 V input capacitor is required.
2. Tested at nominal input, 20~100% load, 20 MHz bandwidth, with 10 µF electrolytic and 1 µF ceramic capacitor on the output. At loads below 20%, the max ripple and
noise of the 3.3 & 5 Vdc outputs will be 100 mVp-p, and the other outputs will be 2% Vo.
3. Measured at min Vin, full load.
4. All specifications are measured at Ta=25°C, humidity < 75%, nominal input voltage, and rated output load unless otherwise specified.
PART NUMBER KEY
Base Number
VX78 XX - 1000
Output Voltage Output Current
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date 05/18/2017 page 2 of 8CUI Inc SERIES: VX78-1000 DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR
INPUT
parameter conditions/description min typ max units
operating input voltage1for positive output applications
for negative output applications
6
8
24
12
36
27
Vdc
Vdc
filter capacitor filter
input reverse polartiy protection no
no-load input current positive outputs 0.1 1 mA
Note: 1. See Model section on page 1 for specific input voltage ranges.
OUTPUT
parameter conditions/description min typ max units
maximum capacitive load2for positive output applications
for negative output applications
680
330
μF
μF
voltage accuracy
at full load, input voltage range
3.3 Vdc output model
all other models
±2
±2
±4
±3
%
%
line regulation at full load, input voltage range ±0.2 ±0.4 %
load regulation at nominal input, 10~100% load ±0.4 ±0.6 %
switching frequency
at nominal input voltage, full load
3.3/5 Vdc output models
all other models
420
580
520
680
620
780
kHz
kHz
transient recovery time at nominal input voltage, 25% load step change 0.1 1 ms
transient response deviation at nominal input voltage, 25% load step change 50 300 mV
temperature coefficient at full load ±0.03 %/°C
Note: 2. The maximum capacitive load was tested at nominal input voltage, full load.
PROTECTIONS
parameter conditions/description min typ max units
short circuit protection continuous, auto recovery
SAFETY AND COMPLIANCE
parameter conditions/description min typ max units
safety approvals UL 60950-1
EMI/EMC EN 55032, EN 55024
conducted emissions CISPR22/EN55022, class B (external circuit required, see Figure 4-b)
radiated emissions CISPR22/EN55022, class B (external circuit required, see Figure 4-b)
ESD IEC/EN61000-4-2, contact ± 4kV, class B
radiated immunity IEC/EN61000-4-3, 10V/m, class A
EFT/burst IEC/EN61000-4-4, ± 1kV, class B (external circuit required, see Figure 4-a)
surge IEC/EN61000-4-5, line-line ± 1kV, class B (external circuit required, see Figure 4-a)
conducted immunity IEC/EN61000-4-6, 3 Vr.m.s, class A
MTBF as per MIL-HDBK-217F, 25°C 2,000,000 hours
RoHS 2011/65/EU
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date 05/18/2017 page 3 of 8CUI Inc SERIES: VX78-1000 DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR
10 Sec. Max.
Wave Soldering Time
4 Sec. Max.
Peak Temp. 260°C Max.
Time (sec.)
Temperature (°C)
250
200
150
100
50
0
ENVIRONMENTAL
parameter conditions/description min typ max units
operating temperature see derating curve -40 85 °C
storage temperature -55 125 °C
storage humidity non-condensing 5 95 %
SOLDERABILITY
parameter conditions/description min typ max units
wave soldering see wave soldering profile 260 °C
MECHANICAL
parameter conditions/description min typ max units
dimensions 11.50 x 9.00 x 17.50 [0.453 x 0.354 x 0.689 inch] mm
case material black flame-retardant heat-proof plastic (UL94V-0)
weight 3.8 g
MECHANICAL DRAWING
units: mm [inch]
tolerance: ±0.25[±0.010]
pin diameter tolerance: ±0.10[±0.004]
PIN CONNECTIONS
PIN +OUTPUT -OUTPUT
1 +VIN +VIN
2 GND -VOUT
3 +VOUT GND
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date 05/18/2017 page 4 of 8CUI Inc SERIES: VX78-1000 DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR
DERATING CURVE
Ambient Temperature (°C)
Load (%)
-40
60
80
100
40
20
04085
Temperature Derating Curve
(Natural Convention)
120
120
71
0
EFFICIENCY CURVES
6 12 18 24 30 36
90
88
86
84
82
Efficiency (%)
80
78
Input Voltage (Vdc)
92
10 20 30 40 50 60 70 80 90 100
84
82
80
78
76
Efficiency (%)
74
72
Load Current (%)
86
VX7803-1000 Efficiency Curve
Positive Output, Efficiency vs. Input Voltage
(at full load)
VX7803-1000 Efficiency Curve
Positive Output, Efficiency vs. Load Current
(at Vin nominal)
16 20 24 28 32 36
98
96
94
92
90
Efficiency (%)
88
86
Input Voltage (Vdc)
84
82
Load Current (%)
10 20 30 40 50 60 70 80 90 100
96
94
92
90
88
Efficiency (%)
86
84
82
VX78012-1000 Efficiency Curve
Positive Output, Efficiency vs. Input Voltage
(at full load)
VX78012-1000 Efficiency Curve
Positive Output, Efficiency vs. Load Current
(at Vin nominal)
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date 05/18/2017 page 5 of 8CUI Inc SERIES: VX78-1000 DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR
EFFICIENCY CURVES (CONTINUED)
8 12 16 20
90
89
88
87
86
Efficiency (%)
85
Input Voltage (Vdc) Load Current (%)
10 20 30 40 50 60 70 80 90 100
94
90
86
82
78
Efficiency (%)
74
70
VX78012-1000 Efficiency Curve
Negative Output, Efficiency vs. Input Voltage
(at full load)
VX78012-1000 Efficiency Curve
Negative Output , Efficiency vs. Load Current
(at Vin nominal)
20 24 28 32 36
97
96
95
94
93
Efficiency (%)
92
91
Input Voltage (Vdc)
90 10 20 30 40 50 60 70 80 90 100
96
95
94
93
92
Efficiency (%)
91
90
Load Current (%)
VX7815-1000 Efficiency Curve
Positive Output, Efficiency vs. Input Voltage
(at full load)
VX7815-1000 Efficiency Curve
Positive Output, Efficiency vs. Load Current
(at Vin nominal)
8 12 16 18
92
90
88
86
84
Efficiency (%)
82
80
Input Voltage (Vdc) Load Current (%)
10 20 30 40 50 60 70 80 90 100
94
90
86
82
Efficiency (%)
78
74
70
VX7815-1000 Efficiency Curve
Negative Output, Efficiency vs. Input Voltage
(at full load)
VX7815-1000 Efficiency Curve
Negative Output, Efficiency vs. Load Current
(at Vin nominal)
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date 05/18/2017 page 6 of 8CUI Inc SERIES: VX78-1000 DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR
Table 1
1
3
2
+Vin
GND
-Vout
C2
GND
DC/DC
1
2
3+Vout
C1
C3 C4
LDM
DC/DC
Model Number C1, C3
(ceramic capacitor)
C2, C4
(ceramic capacitor)
VX7803-1000 10 μF/50 V 22 μF/10 V
VX7805-1000 10 μF/50 V 22 μF/10 V
VX78039-1000 10 μF/50 V 22 μF/16 V
VX78012-1000 10 μF/50 V 22 μF/25 V
VX7815-1000 10 μF/50 V 22 μF/25 V
External Capacitor Table
TYPICAL APPLICATION CIRCUIT
Positive Output Application Circuit Negative Output Application Circuit
Positive and Negative Output Paralleling Application Circuit
+Vin
GNDGND
DC/DC
1
2
3+Vout
C1 C2
+Vin
GN DGN D
DC/DC
12
3
-Vout
C1 C2
Figure 1
Figure 3
Figure 2
EMC RECOMMENDED CIRCUIT
DC/DC
Vin
LDM2
E
C0
LDM1
MOV
FUSE
D
C3
V
in
GN
D
+
+Vo
GN DLO
AD
C2C1
Table 2Figure 4
Recommended external circuit components
FUSE choose according to actual input current
MOV S20K30
LDM1 82 µH
C0 680 µF/50 V
C1, C2 see Table 1
C3 4.7 µF/50 V
LDM2 12 µH
Note: 1. C1 & C2 (C3 & C4) are required and should be connected as close to the module pins as possible.
2. To reduce the output ripple further, C2 & C4 can be increased as needed and the use of tantalum or low ESR electrolytic capacitors would be recommended.
3. When using application circuit in Figure 3, a 10 µH LDM component is recommended to reduce the interference.
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date 05/18/2017 page 7 of 8CUI Inc SERIES: VX78-1000 DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR
PACKAGING
units: mm
Tube Size: 11.6 x 27.1 x 530 mm
QTY: 44 pcs
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date 05/18/2017 page 8 of 8CUI Inc SERIES: VX78-1000 DESCRIPTION: NON-ISOLATED DC SWITCHING REGULATOR
CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website.
CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is
assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use.
CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical component is any component of a
life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
Headquarters
20050 SW 112th Ave.
Tualatin, OR 97062
800.275.4899
Fax 503.612.2383
cui.com
techsupport@cui.com
rev. description date
1.0 initial release 05/18/2017
The revision history provided is for informational purposes only and is believed to be accurate.
REVISION HISTORY
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