SG3526_06 datasheet(4/9 Pages) ONSEMI | Pulse Width Modulation Control Circuit

4 page

SG3526

http://onsemi.com

ELECTRICAL CHARACTERISTICS (continued)

Characteristics

Symbol

Min

Typ

Max

Unit

PWM COMPARATOR SECTION (Note 10)

Minimum Duty Cycle

(VCompensation = +0.4 V)

DCmin

−

Maximum Duty Cycle

(VCompensation = +3.6 V)

DCmax

−

DIGITAL PORTS (SYNC, SHUTDOWN, RESET)

Output Voltage

(High Logic Level) (Isource = 40 μA)

(Low Logic Level) (Isink = 3.6 mA)

VOH

VOL

2.4

−

4.0

0.2

−

0.4

Input Current ⎯ High Logic Level

(High Logic Level) (VIH = +2.4 V)

(Low Logic Level) (VIL = +0.4 V)

IIH

IIL

−

−125

−225

−200

−360

μA

CURRENT LIMIT COMPARATOR SECTION (Note 12)

Sense Voltage (RS ≤ 50 Ω)

Vsense

100

120

Input Bias Current

IIB

−

−3.0

−10

μA

SOFT−START SECTION

Error Clamp Voltage (Reset = +0.4 V)

−

0.1

0.4

CSoft−Start Charging Current (Reset = +2.4 V)

ICS

100

150

μA

OUTPUT DRIVERS (Each Output, VC = +15 Vdc, unless otherwise noted.)

Output High Level

Isource = 20 mA

Isource = 100 mA

VOH

12.5

13.5

−

Output Low Level

Isink = 20 mA

Isink = 100 mA

VOL

−

0.2

1.2

0.3

2.0

Collector Leakage, VC = +40 V

IC(leak)

−

150

μA

Rise Time (CL = 1000 pF)

−

0.3

0.6

μs

Fall Time (CL = 1000 pF)

−

0.1

0.2

μs

Supply Current

(Shutdown = +0.4 V, VCC = +35 V, RT = 4.12 kΩ)

ICC

−

10. fosc = 40 kHz (RT = 4.12 kΩ ± 1%, CT = 0.01 μF ± 1%, RD = 0 Ω)

11. 0 V ≤ VCM ≤ +5.2 V

12. 0 V ≤ VCM ≤ +12 V

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