CS5322GDWR28 datasheet(7/21 Pages) ONSEMI

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CS5322

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ELECTRICAL CHARACTERISTICS (continued) (0°C < TA < 70°C; 0°C < TJ < 125°C; 4.7 V < VCCL < 14 V; 8.0 V < VCCH < 20 V;

CGATE(H) = 3.3 nF, CGATE(L) = 3.3 nF, RR(OSC) = 32.4 k, CCOMP = 1.0 nF, CSS = 0.1 μF, CREF = 0.1 μF, DAC Code 10000, CVCC = 1.0 μF,

ILIM ≥ 1.0 V; unless otherwise specified.)

Characteristic

Unit

Max

Typ

Min

Test Conditions

General Electrical Specifications

VCCL Operating Current

VFB = COMP (no switching)

−

24.5

VCCL1 Operating Current

VFB = COMP (no switching)

−

4.0

5.5

VCCL2 Operating Current

VFB = COMP (no switching)

−

4.0

5.5

VCCH1 Operating Current

VFB = COMP (no switching)

−

2.8

4.0

VCCH2 Operating Current

VFB = COMP (no switching)

−

2.5

3.5

VCCL Start Threshold

GATEs switching, Soft Start charging

4.05

4.4

4.7

VCCL Stop Threshold

GATEs stop switching, Soft Start discharging

3.75

4.2

4.6

VCCL Hysteresis

GATEs not switching, Soft Start not charging

100

200

300

VCCH1 Start Threshold

GATEs switching, Soft Start charging

1.8

2.0

2.2

VCCH1 Stop Threshold

GATEs stop switching, Soft Start discharging

1.55

1.75

1.90

VCCH1 Hysteresis

GATEs not switching, Soft Start not charging

100

200

300

PACKAGE PIN DESCRIPTION

PACKAGE PIN #

PIN SYMBOL

FUNCTION

SO−28L

COMP

Output of the error amplifier and input for the PWM

comparators.

VFB

Voltage Feedback Pin. To use Adaptive Voltage Positioning

(AVP) select an offset voltage at light load and connect a

resistor between VFB and VOUT. The input current of the VFB

pin and the resistor value determine output voltage offset for

zero output current. Short VFB to VOUT for no AVP.

VDRP

Current sense output for AVP. The offset of this pin above the

DAC voltage is proportional to the output current. Connect a

resistor from this pin to VFB to set amount AVP or leave this

pin open for no AVP.

4−5

CS1−CS2

Current sense inputs. Connect current sense network for the

corresponding phase to each input.

CSREF

Reference for Current Sense Amplifiers. To balance input

offset voltages between the inverting and noninverting inputs

of the Current Sense Amplifiers, connect a resistor between

CSREF and the output voltage. The value should be 1/3 of

the value of the resistors connected to the CSx pins.

PWRGD

Power Good Output. Open collector output goes low when

CSREF is out of regulation.

8−12

VID4−VID0

Voltage ID DAC inputs. These pins are internally pulled up to

3.3 V if left open.

ILIM

Sets threshold for current limit. Connect to reference through

a resistive divider.

REF

Reference output. Decouple with 0.1 μF to LGND.

VCCH2

Power for GATE(H)2.

GATE(H)2

High side driver #2.

GND2

Return for #2 driver.

GATE(L)2

Low side driver #2.

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