⎪Efficiency up to 96%, Non-isolated, No needRegulator requires

for heatsinks

High efficiency required

Pin-out compatible with LM78XX Linear

Very lowest profile( L*W*H=11.5*8.5*17.5 )Wide input range.(4.75V ~ 32V)

Short circuit protection, Thermal shutdown-40°C to +85°C Operating TemperaturePart number

Input voltage

Output voltage

Ripple &Noise(Typ.)

Output current (1)@ full load

Efficiency
Max. Input/ Min. Input

Capacitive Load (2)Max.

C78B1.2-2.0J

4.75-32 VDC

1.2 VDC50mVp-p

2000mA

72%/87%3300μF

C78B1.5-2.0J

4.75-32 VDC

1.5 VDC

50mVp-p

2000mA

79%/90%3300μF

C78B1.8-2.0J

4.75-32 VDC

1.8 VDC

50mVp-p

2000mA

80%/91%3300μF

C78B2.5-2.0J

4.75-32 VDC

2.5 VDC

50mVp-p

2000mA84%/92%2300μF

C78B3.3-2.0J

4.75-32 VDC

3.3 VDC

50mVp-p

2000mA86%/92%1800μF

C78B5.0-2.0J

6.5-32 VDC

5 VDC

75mVp-p

2000mA

90%/94%820μF

C78B9.0-2.0J

11-32 VDC

9 VDC

75mVp-p

2000mA93%/95%620μF

C78B12-2.0J

15-32 VDC

12 VDC

75mVp-p

2000mA94%/96%470μF

C78B15-2.0J

18-32 VDC

15 VDC

75mVp-p

2000mA

95%/96%

470μF

1.

(1)

The output current can use 2.5A with < 1 second.

2.

(2)

The capacitive load is test by constant resistive load.

3.

All specifications valid at nominal input voltage, full load and 25℃ after warm-up time unless otherwise stated.

C78B1.2-2.0J
Input voltage

Output current

CTC is the professional and one among world’s leading manufacturers of DC-DC/ AC-DC converters.
The products were used in Computers, Industrial controls, Medical equipment, Transportation, EV, ECO-power, Aero-space application and communication.
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∣

Input

∣

Parameter

Conditions

Input current@no load

⎪

Min.

Typ.

Voltage accuracy

Output

2.0mA±2%

LL to HL at 100% Load

±0.5%

Load voltage regulation

0% to 100% full load

±1%0%

460

kHz

0.35-0.8W

Minimum load
Operating frequency

100% Load at
Nominal Vin=24VInternal power dissipationVo=1.5V

Operating temperature

with de-rating-40

85

˚C-55

125

˚C

Max. case temperature

105

˚C

Relative Humidity

95

MTBF (MIL-HDBK-217F)+25˚C6349

Short-circuit protection

Function

Continuous, automatic recovery

Short circuit input current

Nominal Vin=24V for Vout < 5V50mA

Nominal Vin=24V for Vout > 5V

75mA
MIL-STD-202

Safety Approvals

EMC
1.
2.
3.

EN60950

Dimension

17.5x11.5x8.5mm

Weight4

Cooling method

Free air convection

Case material

Plastic case (UL94V-0)

Potting material

Silicon (UL94V-0)

gEMI conduction

EN55022Class A/B (1)EMI radiation

EN55022Class A/B (1)Please check EMI application Circuit.
All specifications valid at nominal input voltage, full load and 25℃ after warm-up time unless otherwise stated.
The product information and specifications are subject to change without prior notice.
(1)

CTC is the professional and one among world’s leading manufacturers of DC-DC/ AC-DC converters.
The products were used in Computers, Industrial controls, Medical equipment, Transportation, EV, ECO-power, Aero-space application and communication.
⎢%RHKHrs

Vibration

PhysicalUnit

Line voltage regulationStorage temperature
EnvironmentMax.

T 07-7017088⎢

F 07-7017063⎢

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∣∣

⎪

Load
120%
100%
80%
60%
40%
20%0%

-40

010 20 30

40 50 60

70 80

Operating Temperature (℃)

85

90 100 110

The derating curve was measured in chamber with natural convection.

ClassC1

L1

C2Class A

1206 4.7μF 50V MLCC

3.3μH

xClass B

1210 10μF 50V MLCC

10μH

1206 4.7μF 50V MLCC

CTC is the professional and one among world’s leading manufacturers of DC-DC/ AC-DC converters.
The products were used in Computers, Industrial controls, Medical equipment, Transportation, EV, ECO-power, Aero-space application and communication.
⎢

T 07-7017088⎢

F 07-7017063⎢

www.powerctc.com⎢

sales@ctc-dc-dc.com

∣

∣

⎪

PinSingle

1+Vin

2

GND

3+Voutxx.x±0.5mm
xx.xx±0.25mm

CTC is the professional and one among world’s leading manufacturers of DC-DC/ AC-DC converters.
The products were used in Computers, Industrial controls, Medical equipment, Transportation, EV, ECO-power, Aero-space application and communication.
⎢

T 07-7017088⎢

F 07-7017063⎢

www.powerctc.com⎢sales@ctc-dc-dc.com