CS5421 데이터 시트보기 (PDF) - ON Semiconductor

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CS5421

Dual Out−of−Phase Synchronous Buck Controller with Remote Sense

ON Semiconductor 

CS5421

PACKAGE PIN DESCRIPTION (continued)

PACKAGE PIN #

16 Lead SO Narrow

10

11

12

13

14

PIN SYMBOL

VFB2

VFFB2

ROSC

VCC

PGND2

15

GATE(L)2

16

GATE(H)2

VCC

ROSC

FUNCTION

Error amplifier inverting input for channel 2.

Input for the channel 2 PWM comparator.

A resistor from this pin to ground sets switching frequency.

Input Power supply pin.

High Current ground for the GATE(H)2 and GATE(L)2 pins.

Low Side Synchronous FET driver pin for the channel 2 FET.

High Side Switch FET driver pin for the channel 2 FET.

BIAS

CURRENT

SOURCE

GEN

RAMP1

RAMP2

VFFB1

VFFB2

8.6 V

7.8 V

−

VCC

−

+

S

Q FAULT

Set

Dominant

R

− 0.25 V

E/A OFF

OSC

CLK1

CLK2

PWM

Comparator 1 −

+

FAULT

RAMP1

0.45 V

−

+

PWM

Comparator 2

FAULT

RAMP2

S

Reset

Dominant

R

S

Reset

Dominant

R

VCC

VCC

VCC

VCC

5.0 μA

1.0 V

E/A1

0.45 V

−

1.0 V

E/A OFF 1.0 mA

−

+

E/A2

SGND VFB COMP1 VFB2

COMP2

Figure 2. Block Diagram

FAULT

LGND

GATE(H)1

GATE(L)1

PGND1

GATE(H)2

GATE(L)2

PGND2

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