CS5661EDWR16 View Datasheet(PDF) - Cherry semiconductor

Part Name

Description

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CS5661EDWR16

High Performance Dual Channel Current Mode Controller with ENABLE

Cherry semiconductor 

Operating Description: continued

ter capacitor. Ceramic bypass capacitors (0.1µF) connected

directly to VCC and VREF may be required to improve noise

filtering. This provides a low impedance path for filtering

the high frequency noise. All high current loops should be

kept as short as possible using heavy copper runs. The

error amp compensation circuitry and the converter out-

put voltage-divider should be located close to the IC and

as far as possible from the power switch and other noise

generating components.

Timing Diagram

SYNC

Capacitor CT

Latch 1

“Set” Input

COMP1

Sense1

Latch 1

“Reset” Input

VOUT1

ENABLE2

0V

Latch 2

“Set” Input

COMP2

Sense2

Latch 2

“Reset” Input

VOUT2

Typical Application Diagram

Dual Boost Regulator

VCC

CF2

VREF

Sync

VOUT1

RFB1

RT CT

RFB2

VFB1

COMP1

VOUT2

ENABLE2

RFB3

RFB4

VFB2

COMP2

5.0V

2.5V

R

Internal

Bias

Reference

Regulator

R

+

3.4V-

VREF

UVLO

20kΩ

VCC +

UVLO -

8.4V

+

Oscillator

+

1mA

Current Sense

2R Comparator 1

+

-

Error

Amp 1

+ 1.0V

R-

250µA

PWM

Latch 1

S

RQ

+

-

Error

Amp 2

+

1mA

Current Sense

Comparator 2

2R

+

1.0V

R-

PWM

Latch 2

S

RQ

R

Gnd Pwr Gnd

VIN

CF1 +

L1

D1

Q1

VOUT1

RSense1

L2

D2

Sense1

Q2

VOUT2

VOUT1

+

COUT1

+

VOUT2

COUT2

Sense2

RSense2

7

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