NCP1937A3DR2G datasheet(6/38 Pages) ONSEMI

Part #	NCP1937A3DR2G

Description	Combination Power Factor Correction and Quasi-Resonant Flyback Controllers for Adapters

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NCP1937

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Table 3. MAXIMUM RATINGS (Notes 1 − 6)

Rating

Unit

Value

Symbol

QR Feedback Input Voltage

7

VQCT

−0.3 to 10

V

QR Feedback Input Current

7

IQCT

10

mA

QR Flyback Current Sense Input Voltage

13

VQCS

−0.3 to 10

V

QR Flyback Current Sense Input Current

13

IQCS

10

mA

QR Flyback Feedback Input Voltage

10

VQFB

−0.3 to 10

V

QR Flyback Feedback Input Current

10

IQFB

10

mA

PSTimer Input Voltage

9

VPSTimer

−0.3 to 10

V

PSTimer Input Current

9

IPSTimer

10

mA

PFC Driver Maximum Voltage (Note 2)

15

VPDRV

−0.3 to VPDRV(high)

V

PFC Driver Maximum Current

15

IPDRV(SRC)

IPDRV(SNK)

500

800

mA

Flyback Driver Maximum Voltage (Note 2)

14

VQDRV

−0.3 to VQDRV(high)

V

Flyback Driver Maximum Current

14

IQDRV(SRC)

IQDRV(SNK)

500

800

mA

PFC ON/OFF Threshold Adjust Input Voltage

6

VPONOFF

−0.3 to 10

V

PFC ON/OFF Threshold Adjust Input Current

6

IPONOFF

10

mA

Operating Junction Temperature

N/A

TJ

−40 to 125

_C

Storage Temperature Range

N/A

TSTG

–60 to 150

_C

Power Dissipation (TA = 75_C, 1 Oz Cu, 0.155 Sq Inch Printed Circuit

Copper Clad)

Plastic Package SOIC−20NB

PD

0.62

W

Thermal Resistance, Junction to Ambient 1 Oz Cu Printed Circuit

Copper Clad)

Plastic Package SOIC−20NB

RθJA

121

_C/W

ESD Capability (Note 6)

Human Body Model per JEDEC Standard JESD22−A114F.

Machine Model per JEDEC Standard JESD22−A115−A.

Charge Device Model per JEDEC Standard JESD22−C101E.

HBM

MM

CDM

3000

200

750

V

Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality

should not be assumed, damage may occur and reliability may be affected.

1. VPCS/PZCD(MAX) is the maximum voltage of the pin shown in the electrical table. When the voltage on this pin exceeds 5 V, the pin sinks

a current equal to (VPCS/PZCD − 5 V) / (2 kW). A VPSC/PZCD of 7 V generates a sink current of approximately 1 mA.

2. Maximum driver voltage is limited by the driver clamp voltage, VXDRV(high), when VCC exceeds the driver clamp voltage. Otherwise, the

maximum driver voltage is VCC.

3. Maximum Ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond

those indicated may adversely affect device reliability. Functional operation under absolute maximum–rated conditions is not implied.

Functional operation should be restricted to the Recommended Operating Conditions.

4. This device contains Latch−Up protection and exceeds

± 100 mA per JEDEC Standard JESD78.

5. Low Conductivity Board. As mounted on 80 x 100 x 1.5 mm FR4 substrate with a single layer of 50 mm2 of 2 oz copper traces and heat

spreading area. As specified for a JEDEC51−1 conductivity test PCB. Test conditions were under natural convection of zero air flow.

6. Pins 1, 3, and 20 are rated to the maximum voltage of the part, or 700 V.

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