OP-4-18V-28V-H 9-36 V Input, 28 V/6.5 A Output Half-brick

OP-4-18V-28V-H

OP-4-18V-28V-H 9-36 V Input, 28 V/6.5 A Output Half-brick

Property

Value

Maximum Input Current (Max.)

29.9 A

Maximum Input Current (Notes & Conditions)

Vin min; trim up; in current limit

No-Load Input Current (enabled) (Typ.)

230 mA

No-Load Input Current (enabled) (Max.)

290 mA

Disabled Input Current (Typ.)

2 mA

Disabled Input Current (Max.)

4 mA

Response to Input Transient (Typ.)

1 V

Response to Input Transient (Notes & Conditions)

500 V/ms

Input Terminal Ripple Current (Typ.)

550 mA

Input Terminal Ripple Current (Notes & Conditions)

RMS

Recommended Input Fuse (Max.)

30 A

Recommended Input Fuse (Notes & Conditions)

Fast acting fuse recommended

Output Voltage Set Point (Min.)

27.72 V

Output Voltage Set Point (Typ.)

28.00 V

Output Voltage Set Point (Max.)

28.28 V

Over Line (Typ.)

+/-0.1 %

Over Line (Max.)

+/-0.3 %

Over Load (Typ.)

+/-0.1 %

Over Load (Max.)

+/-0.3 %

Over Temperature (Min.)

-420 mV

Over Temperature (Max.)

420 mV

Total Output Voltage Range (Min.)

27.30 V

Total Output Voltage Range (Max.)

28.70 V

Total Output Voltage Range (Notes & Conditions)

Over sample, line, load, temperature & life

Output Voltage Ripple and Noise (Notes & Conditions)

20 MHz bandwidth

Peak-to-Peak (Typ.)

65 mV

Peak-to-Peak (Max.)

130 mV

Peak-to-Peak (Notes & Conditions)

Full load

RMS (Typ.)

11 mV

RMS (Max.)

20 mV

RMS (Notes & Conditions)

Full load

Operating Output Current Range (Min.)

0 A

Operating Output Current Range (Max.)

6.5 A

Operating Output Current Range (Notes & Conditions)

Subject to thermal derating

Output DC Current Limit Inception (Min.)

7.2 A

Output DC Current Limit Inception (Typ.)

7.8 A

Output DC Current Limit Inception (Max.)

8.5 A

Output DC Current Limit Inception (Notes & Conditions)

Output voltage 10 % Low

Output DC Current Limit Shutdown Voltage (Typ.)

16 V

Back-Drive Current Limit while Enabled (Typ.)

0.2 A

Back-Drive Current Limit while Enabled (Notes & Conditions)

Negative current drawn into output pins

Back-Drive Current Limit while Disabled (Typ.)

3 mA

Back-Drive Current Limit while Disabled (Notes & Conditions)

Negative current drawn into output pins

Maximum Output Capacitance (Max.)

250 uF

Maximum Output Capacitance (Notes & Conditions)

Vout nominal at full load (resistive load)

Settling Time (Typ.)

80 us

Settling Time (Notes & Conditions)

To within 1 % Vout nom

Output Voltage Trim Range (Min.)

-20 %

Output Voltage Trim Range (Max.)

10 %

Output Voltage Trim Range (Notes & Conditions)

Across Pins 8 & 4; Common Figures 3-5

Output Voltage Remote Sense Range (Max.)

10 %

Output Voltage Remote Sense Range (Notes & Conditions)

Across Pins 8 & 4

Output Over-Voltage Protection (Min.)

32.8 V

Output Over-Voltage Protection (Typ.)

34.2 V

Output Over-Voltage Protection (Max.)

35.6 V

Output Over-Voltage Protection (Notes & Conditions)

Over full temp range

100 % Load (Typ.)

89 %

100 % Load (Notes & Conditions)

See Figure 1 for efficiency curve

50 % Load (Typ.)

91 %

50 % Load (Notes & Conditions)

See Figure 1 for efficiency curve

Operating Input Voltage Range (Min.)

9 V

Operating Input Voltage Range (Typ.)

18 V

Operating Input Voltage Range (Max.)

36 V

Operating Input Voltage Range (Notes & Conditions)

40 V transient for 1 s

Turn-On Voltage Threshold (Min.)

9.8 V

Turn-On Voltage Threshold (Typ.)

10.1 V

Turn-On Voltage Threshold (Max.)

10.4 V

Turn-Off Voltage Threshold (Min.)

8.2 V

Turn-Off Voltage Threshold (Typ.)

8.4 V

Turn-Off Voltage Threshold (Max.)

8.7 V

Input Over-Voltage Shutdown (Typ.)

– V

Input Over-Voltage Shutdown (Notes & Conditions)

Not Available

Recommended External Input Capacitance (Typ.)

820 uF

Recommended External Input Capacitance (Notes & Conditions)

Typical ESR 0.1-0.2 Ohm

Input Filter Component Values (LC) (Typ.)

0.3432 uH uF

Input Filter Component Values (LC) (Notes & Conditions)

Internal values

Non-Operating (Min.)

-1 V

Non-Operating (Max.)

40 V

Non-Operating (Notes & Conditions)

Continuous

Operating (Max.)

36 V

Operating (Notes & Conditions)

Continuous

Operating Transient (Max.)

40 V

Operating Transient (Notes & Conditions)

1 s transient, square wave

Input to Output (Max.)

2250 Vdc

Input to Baseplate (Max.)

2250 Vdc

Output to Baseplate (Max.)

2250 Vdc

Operating Temperature (Min.)

-40 °C

Operating Temperature (Max.)

100 °C

Operating Temperature (Notes & Conditions)

Baseplate temperature

Storage Temperature (Min.)

-45 °C

Storage Temperature (Max.)

125 °C

Voltage at ON/OFF input pin (Min.)

-2 V

Voltage at ON/OFF input pin (Max.)

18 V

Turn-On Time (Typ.)

10 ms

Turn-On Time (Notes & Conditions)

Full load, Vout = 90 % nom. (from enable)

Start-Up Inhibit Time (Min.)

180 ms

Start-Up Inhibit Time (Typ.)

200 ms

Start-Up Inhibit Time (Max.)

220 ms

Start-Up Inhibit Time (Notes & Conditions)

Figure E

Output Voltage Overshoot (Typ.)

0 %

Output Voltage Overshoot (Notes & Conditions)

Maximum Output Capacitance

Isolation Voltage (dielectric strength) (Notes & Conditions)

See Absolute Maximum Ratings

Isolation Resistance (Typ.)

30 M Ohm

Isolation Capacitance (input to output) (Typ.)

1000 pF

Isolation Capacitance (input to output) (Notes & Conditions)

See Note 2

Semiconductor Junction Temperature (Max.)

125 °C

Semiconductor Junction Temperature (Notes & Conditions)

Package rated to 150 °C

PCB Temperature (Max.)

125 °C

PCB Temperature (Notes & Conditions)

UL rated max operating temp 130 °C

Transformer Temperature (Max.)

125 °C

Maximum Baseplate Temperature, Tb (Max.)

100 °C

Switching Frequency (Min.)

255 kHz

Switching Frequency (Typ.)

275 kHz

Switching Frequency (Max.)

295 kHz

Switching Frequency (Notes & Conditions)

Isolation stage switching freq. is half this

Off-State Voltage (Min.)

2.4 V

Off-State Voltage (Max.)

1.8 V

On-State Voltage (Min.)

-2

On-State Voltage (Max.)

0.8

Pull-Up Voltage (Typ.)

5 V

Pull-Up Resistance (Typ.)

50 k Ohm

Over-Temperature Shutdown OTP Trip Point (Typ.)

125 °C

Over-Temperature Shutdown OTP Trip Point (Notes & Conditions)

Average PCB Temperature

Over-Temperature Shutdown Restart Hysteresis (Typ.)

10 °C

Calculated MTBF (Telcordia) TR-NWT-000332 (Typ.)

1.44 10^6 Hrs.

Calculated MTBF (Telcordia) TR-NWT-000332 (Notes & Conditions)

Tb = 70 °C

Calculated MTBF (MIL-217) MIL-HDBK-217F (Typ.)

1.20 10^6 Hrs.

Calculated MTBF (MIL-217) MIL-HDBK-217F (Notes & Conditions)

Tb = 70 °C

Step Change in Output Current (0.1 A/ us) (Typ.)

1900 mV

Step Change in Output Current (0.1 A/ us) (Notes & Conditions)

50 % to 75 % to 50 % Iout max

Lockout Voltage Hysteresis (Typ.)

1.7 V

ON/OFF Control (Notes & Conditions)

Application notes Figures A & B

Features

High efficiency up to 90% with minimal power derating for optimized thermal management.

Wide 9-36V input voltage range with fixed-frequency switching for predictable EMI characteristics.

Advanced output regulation featuring remote sensing, wide voltage trim, and zero-load stability.

Comprehensive protection suite including input UVLO, OVP, short-circuit protection, and active back-drive current limiting.

Dedicated thermal shutdown and input-referenced On/Off control for enhanced system reliability.

Industry-standard half-brick footprint with optional flanged baseplate for flexible mechanical integration.

Certified to UL/CSA/EN 62368-1 safety standards and fully RoHS compliant.

Applications

Industrial and Transportation applications