PDF《UCC28C4x-EP》

2007 over operating free-air temperature range (unless otherwise noted) MIN MAX UNIT VDD

20 V Supply voltage Max ICC

30 mA Output current, IOUT peak ±1 A Output energy, capacitive load

5 ?J COMP, CS, FB C0.3 6.3 OUT C0.3

20 Voltage rating V RT/CT C0.3 6.3 VREF

7 Error amplifier output sink current

10 mA TJ Operating junction temperature range(3) C55

150 °C Tstg Storage temperature range C65

150 °C Lead temperature (soldering,

10 s)

300 °C (1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) All voltages are with respect to ground. Currents are positive into and negative out of the specified terminals. (3) Long-term high temperature storage and/or extended use at maximum recommended operating conditions may result in a reduction of overall device life. See http://www.ti.com/ep_quality for additional information about enhanced plastic packaging. θja TA < 25°C DERATING FACTOR TA = 70°C TA = 85°C TA = 125°C PACKAGE (°C/W) POWER RATING ABOVE TA = 25°C POWER RATING POWER RATING POWER RATING D

176 710 mW 5.68 mW/°C

454 mW

369 mW

142 mW MIN MAX UNIT VDD Input voltage

18 V VOUT Output voltage range

18 V IOUT (1) Average output current

200 mA IOUT(ref)(1) Reference output current C20 mA TJ (1) Operating junction temperature C55

150 °C (1) It is not recommended that the device operate under conditions beyond those specified in this table for extended periods of time.

3 Submit Documentation Feedback (6) Gain is defined as Electrical Characteristics UCC28C4x-EP BiCMOS LOW-POWER CURRENT-MODE PWM CONTROLLERS SGLS352BCDECEMBER 2006CREVISED MAY

2007 VDD =

15 V(1) , RT =

10 k?, CT = 3.3 nF, CVDD = 0.1 ?F and no load on the outputs, TA = TJ = C55°C to 125°C for the UCC28C4x PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Reference Output voltage, initial accuracy TA = 25°C , IOUT =

1 mA 4.9

5 5.1 V Line regulation VDD =

12 V to

18 V 0.2

20 mV Load regulation

1 mA to

20 mA

3 25 mV Temperature stability (2) 0.2 0.4 mV/°C Total output variation (2) 4.82 5.18 V Output noise voltage

10 Hz to

10 kHz, TA = 25°C

50 ?V Long term stability

1000 hours, TA = 125°C(2)

5 25 mV Output short circuit C30 C45 C55 mA Oscillator TA = 25°C(3) 50.5

53 55 kHz Initial accuracy TA = Full Range(3) 50.5

57 KHz Voltage stability VDD =

12 V to

18 V 0.2 2.85 % Temperature stability TMIN to TMAX (2)

1 2.5 % Amplitude RT/CT pin peak to peak 1.9 V TA = 25°C, RT/CT =

2 V(4) 7.7 8.4

9 mA Discharge current RT/CT =

2 V(4) 7.2 8.4 9.5 mA Error Amplifier Feedback input voltage, initial accuracy VCOMP = 2.5 V, TA = 25°C 2.475 2.500 2.525 V Feedback input voltage, total variation VCOMP = 2.5 V 2.45 2.50 2.55 V Input bias current C0.1 C2 ?A AVOL Open-loop voltage gain VOUT =

2 V to

4 V

65 90 dB Unity gain bandwidth 1.5 MHz PSRR Power-supply rejection ratio VDD =

12 V to

18 V

60 dB Output sink current VFB = 2.7 V, VCOMP = 1.1 V

2 14 mA Output source current VFB = 2.3 V, VCOMP =

5 V C0.5 C1 mA VOH High-level output voltage VFB = 2.3 V, RLOAD =

15 k to GND

5 6.8 V VOL Low-level output voltage VFB = 2.7 V, RLOAD =

15 k to VREF 0.1 1.1 V Current Sense TA = 25°C (5)(6) 2.85

3 3.15 V/V Gain TA = Full Range (5)(6) 2.825 3.15 V/V Maximum input signal VFB