NCP1030 datasheet(6/18 Pages) ONSEMI | Low Power PWM Controller with On-Chip Power Switch and Startup Circuits for 48 V Telecom Systems

6 page

NCP1030, NCP1031

http://onsemi.com

DC ELECTRICAL CHARACTERISTICS (VDRAIN = 48 V, VCC = 12 V, CT = 560 pF, VUV = 3 V, VOV = 2 V, VFB = 2.3 V,

VCOMP = 2.5 V, TJ = −40°C to 125°C, typical values shown are for TJ = 25°C unless otherwise noted.) (Note 2)

Characteristics

Symbol

Min

Typ

Max

Unit

OSCILLATOR

Frequency (CT = 560 pF, Note 3)

TJ = 25°C

TJ = −40°C to 125°C

fOSC1

275

260

300

−

325

kHz

Frequency (CT = 100 pF)

fOSC2

−

800

−

kHz

Charge Current (VCT = 3.25 V)

ICT(C)

−

215

−

Discharge Current (VCT = 3.25 V)

ICT(D)

−

645

−

Oscillator Ramp

Peak

Valley

Vrpk

Vrvly

−

3.5

3.0

−

PWM COMPARATOR

Maximum Duty Cycle

DCMAX

POWER SWITCH CIRCUIT

Power Switch Circuit On−State Resistance (ID = 100 mA)

NCP1030

TJ = 25°C

TJ = 125°C

NCP1031

TJ = 25°C

TJ = 125°C

RDS(on)

−

4.1

6.0

2.1

3.5

7.0

3.0

6.0

Power Switch Circuit and Startup Circuit Breakdown Voltage

(ID = 100 mA, TJ = 25°C)

V(BR)DS

200

−

Power Switch Circuit and Startup Circuit Off−State Leakage Current

(VDRAIN = 200 V, VUV = 2.0 V)

TJ = 25°C

TJ = −40 to 125°C

IDS(off)

−

Switching Characteristics (VDS = 48 V, RL = 100 W)

Rise Time

Fall Time

−

CURRENT LIMIT AND OVER TEMPERATURE PROTECTION

Current Limit Threshold (TJ = 25°C)

NCP1030 (di/dt = 0.5 A/

ms)

NCP1031 (di/dt = 1.0 A/

ms)

ILIM

350

700

515

1050

680

1360

Propagation Delay, Current Limit Threshold to Power Switch Circuit Output

(Leading Edge Blanking plus Current Limit Delay)

tPLH

−

100

−

Thermal Protection (Note 4)

Shutdown Threshold (TJ Increasing)

Hysteresis

TSHDN

THYS

125

−

150

−

°C

TOTAL DEVICE

Supply Current After UV Turn−On

Power Switch Enabled

Power Switch Disabled

Non−Fault condition (VFB = 2.7 V)

Fault Condition (VFB = 2.7 V, VUV = 2.0 V)

ICC1

ICC2

ICC3

2.0

−

3.0

1.5

0.65

4.0

2.0

1.2

2. Production testing for NCP1030DMR2 is performed at 25

°C only; limits at −40°C and 125°C are guaranteed by design.

3. Oscillator frequency can be externally synchronized to the maximum frequency of the device.

4. Guaranteed by design only.

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