CS5422 datasheet(4/17 Pages) ONSEMI

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CS5422

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ELECTRICAL CHARACTERISTICS (0°C < TA < 70°C; 0°C < TJ < 125°C; ROSC = 30.9 k, CCOMP1,2 = 0.1 μF,

10.8 V < VCC < 13.2 V; 10.8 V < BST < 20 V, CGATE(H)1,2 = CGATE(L)1,2 = 1.0 nF, unless otherwise specified.)

Characteristic

Test Conditions

Min

Typ

Max

Unit

Error Amplifier

VFB1(2) Bias Current

VFB1(2) = 0 V

−

0.5

1.6

μA

VFB1(2) Input Range

−

1.1

COMP1,2 Source Current

COMP1,2 = 1.2 V to 2.5 V; VFB1(2) = 0.8 V

μA

COMP1,2 Sink Current

COMP1,2 = 1.2 V; VFB1(2) = 1.2 V

μA

Reference Voltage 1(2)

COMP1 = VFB1; COMP2 = VFB2

0.980

1.000

1.020

COMP1,2 Max Voltage

VFB1(2) = 0.8 V

3.0

3.3

−

COMP1,2 Min Voltage

VFB1(2) = 1.2 V

−

0.25

0.35

Open Loop Gain

−

Unity Gain Band Width

−

kHz

PSRR @ 1.0 kHz

−

Transconductance

−

mmho

Output Impedance

−

2.5

−

MΩ

GATE(H) and GATE(L)

High Voltage (AC)

Measure: VCC − GATE(L)1,2;

BST − GATE(H)1,2; Note 2

−

0.5

Low Voltage (AC)

Measure:GATE(L)1,2 or GATE(H)1,2; Note 2

−

0.5

Rise Time

1.0 V < GATE(L)1,2 < VCC − 1.0 V

1.0 V < GATE(H)1,2 < BST − 1.0 V,

BST ≤ 14 V

−

Fall Time

VCC − 1.0 > GATE(L)1,2 > 1.0 V

BST − 1.0 > GATE(H)1,2 > 1.0 V,

BST ≤ 14 V

−

GATE(H) to GATE(L) Delay

GATE(H)1,2 < 2.0 V, GATE(L)1,2 > 2.0 V

BST ≤ 14 V

GATE(L) to GATE(H) Delay

GATE(L)1,2 < 2.0 V, GATE(H)1,2 > 2.0 V;

BST ≤ 14 V

GATE(H)1(2) and GATE(L)1(2)

pull−down.

Resistance to GND

Note 2

125

280

kΩ

PWM Comparator

Transient Response

COMP1,2 = 1.0 V, VFB1(2) = 0 to 1.2 V

−

150

300

PWM Comparator Offset

VFFB1(2) = 0 V; Increase COMP1,2 until

GATE(H)1,2 starts switching

0.30

0.45

0.60

Artificial Ramp

Duty cycle = 50%, Note 2

100

Minimum Pulse Width

Note 2

−

300

Oscillator

Switching Frequency

ROSC = 61.9 k; Measure GATE(H)1; Note 2

112

150

188

kHz

Switching Frequency

ROSC = 30.9 k; Measure GATE(H)1

224

300

376

kHz

Switching Frequency

ROSC = 15.1 k; Measure GATE(H)1; Note 2

450

600

750

kHz

ROSC Voltage

ROSC = 30.9 k, Note 2

0.970

1.000

1.030

Phase Difference

−

180

−

2. Guaranteed by design, not 100% tested in production.

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