Current-Mode PWM Controllers with Integrated

Startup Circuit for Isolated Power Supplies

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

MAX5015 MAXIMUM DUTY CYCLE

vs. TEMPERATURE

TEMPERATURE (

°C)

V+ SUPPLY CURRENT

vs. TEMPERATURE

1.38

1.39

1.41

1.40

1.44

1.45

1.43

1.42

1.46

-40

0

20

-20

40

60

80

TEMPERATURE (

°C)

4.50

4.65

4.60

4.55

4.75

4.70

4.95

4.90

4.85

4.80

5.00

-40

-20

0

20406080

SOFT-START SOURCE CURRENT

vs. TEMPERATURE

TEMPERATURE (

°C)

CS = SS_SHDN = GND

11.00

11.05

11.15

11.10

11.20

11.25

-40

0

-20

20

40

60

80

V+ INPUT CURRENT vs.

TEMPERATURE (AFTER STARTUP)

TEMPERATURE (

°C)

185

188

187

186

190

189

194

193

192

191

195

-40

-20

0

20

40

60

80

V+ SHUTDOWN CURRENT

vs. TEMPERATURE

TEMPERATURE (

°C)

V+ = 110V, OPTO = SS_SHDN =

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)

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

170

176

174

172

180

178

188

186

184

182

190

-40

-20

0

20

40

60

80

CURRENT-LIMIT DELAY

vs. TEMPERATURE

TEMPERATURE (

°C)

2.400

2.402

2.406

2.404

2.408

2.410

010

15

5

2025303540

Typical Operating Characteristics (continued)