Current-Mode PWM Controllers with Integrated

Startup Circuit

4

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46.8

47.2

47.0

47.6

47.4

47.8

48.0

-40

20

40

-20

0

60

80

MAX5020

MAXIMUM DUTY CYCLE

vs. TEMPERATURE

TEMPERATURE (

°C)

FB = GND

V+ SUPPLY CURRENT

vs. TEMPERATURE

1.55

1.56

1.58

1.57

1.62

1.63

1.61

1.60

1.59

1.64

-40

0

20

-20

40

60

80

TEMPERATURE (

°C)

4.40

4.43

4.42

4.41

4.45

4.44

4.49

4.48

4.47

4.46

4.50

-40

-20

0

20

40

60

80

SOFT-START SOURCE CURRENT

vs. TEMPERATURE

TEMPERATURE (

°C)

V+ = 110V

13.50

13.55

13.70

13.65

13.60

13.75

13.80

-40

0

-20

20

40

60

80

V+ INPUT CURRENT vs.

TEMPERATURE (AFTER STARTUP)

TEMPERATURE (

°C)

179.0

180.0

179.5

180.5

182.0

181.5

181.0

182.5

-40

-20

0

20

40

60

80

V+ SHUTDOWN CURRENT

vs. TEMPERATURE

TEMPERATURE (

°C)

V+ = 110V, FB = SS_SHDN = GND

0.483

0.484

0.486

0.485

0.487

0.488

-40

0

-20

20

40

60

80

CS THRESHOLD VOLTAGE

vs. TEMPERATURE

TEMPERATURE (

°C)

FB = GND

NDRV RESISTANCE

vs. TEMPERATURE

1.0

1.5

2.5

2.0

4.0

4.5

3.5

3.0

5.0

-40

0

20

-20

40

60

80

TEMPERATURE (

°C)

HIGH-SIDE DRIVER

LOW-SIDE DRIVER

-40

-20

0

20

40

60

80

CURRENT-LIMIT DELAY

vs. TEMPERATURE

TEMPERATURE (

°C)

188

190

192

194

196

198

200

202

204

206

208

210

FB = GND, 100mV OVERDRIVE ON CS

2.400

2.402

2.406

2.404

2.408

2.410

010

15

5

2025303540

Typical Operating Characteristics (continued)