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AS2916

PWM Controller

Electrical Characteristics

Electrical characteristics are guaranteed over the full junction temperature range (0-105°). Ambient temperature must be derated

based upon power dissipation and package thermal characteristics. The conditions are: VCC = 15 V, BOK = 3 V, ON = 3 V, RT =

680

Ω, CT = 10 nF, and CWBL = 2.2 nF, unless otherwise specified. To override UVLO, VCC should be raised above UVLOHIGH

prior to test.

Parameter

Symbol

Test Condition

Min.

Typ.

Max.

Unit

Auxiliary PWM Comparator Input (CMPA)

Regulation Voltage

VCCREG

13.4

14.5

15.7

V

Transconductance

Gm

1.0

mS

Output Sink Current

ICMPALow VCC = 16 V, VCMPA = 1.1 V

2.0

6.0

mA

Output Source Current

ICMPAHigh VCC = 12 V, VCMPA = 5 V

–0.5

-1.1

mA

Output Swing High

VCMPAHigh VCC = 12 V, ICMPA = 0.5 mA

5.4

5.7

V

Output Swing Low

VCMPALow VCC = 16 V, ICMPA = 2 mA

0.2

1.1

V

Auxiliary Current Sense Comparator (SNSA)

Transfer Gain

AVSNSA

–0.2

≤ VSNSA ≤ 0.8 V

3.0

V/V

CMPA Level Shift

VLS

VSNSA = 0 V

1.5

V

Current Sense Threshold

VSNSA

VCMPA = 5 V

0.95

1.05

1.15

V

Input Bias Current

IBIAS

–1.0

–10

µA

Propagation Delay to Output tPD

80

150

ns

Main PWM Comparator Input (CMPB)

Comp Source Current

ICMPB

VCMPB = 2.5 V

–1.0

–1.4

mA

Comp Source Impedance

ZCMPB

10

15

20

k

Ω

Comp Source High

VCMPBHigh

5.4

5.6

V

Main Current Sense Comparator (SNSB)

Transfer Gain

AVSNSB

–0.2

≤ VSNSB ≤ 0.8 V

3.0

V/V

CMPB Level Shift

VLS

VSNSB = 0 V

1.5

V

Current Sense Threshold

VSNSB

VCMPB = 5 V

0.95

1.05

1.15

V

Input Bias Current

IBIAS

–1.0

–10

µA

Propagation Delay to Output tPD

80

150

ns

Soft Start Comparator

SS Charge Current

ICharge SS VSS ≤ VRAMP

–4.0

–6.0

–10

µA

SS Discharge Current

IDsc SS

VSS = 1 V, VON <1.5 V

2.0

10

mA

SS Lower Clamp

VSS low

0.05

0.2

V

Propagation Delay to Output tPB

50

100

ns

RAMP High Level

VRAMPH

TJ = 25°C

2.0

2.15

2.3

V

RAMP Low Level

VRAMPL

TJ = 25°C

0.45

0.6

0.75

V

RAMP Levels TC

Note: RAMP waveform is same

–2.0

mV/°C

as OSC waveform, but level

shifted down one diode drop.

RAMP Sink Current

IRAMPL

TJ = 25°C

0.1

0.2

mA

RAMP Source Current

IRAMPH

TJ = 25°C

–2.0

–10

mA