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CS5305GDW28 Fiches technique(PDF) 10 Page - ON Semiconductor

No de pièce CS5305GDW28
Description  Three?뭁hase Synchronous Switching Step?묭own Controller with Single Wire Current Sharing
Download  33 Pages
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Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS5305GDW28 Fiches technique(HTML) 10 Page - ON Semiconductor

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CS5305
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10
PACKAGE PIN DESCRIPTION
Package Pin Number
Pin Symbol
Pin Name
Function
SO−28L
1
OCSET
Over−Current Set
Resistor divider from ROSC to GND programs the threshold of the hiccup
over−current protection.
2
ROSC
Oscillator Frequency
Adjust
Resistance to GND programs the oscillator frequency. It also programs the VFB
bias current shown in Figure 5.
3
ENABL
Enable Input
TTL−Compatible logic input with 50 kΩ internal pull−up resistor to 3.3 V. A logic
low puts the IC in FAULT mode.
4−6
CS1−3
Current Sense Inputs
Non−inverting inputs to the current sense amplifiers.
7
CSREF
Current Sense
Reference
Inverting input to the current sense amplifiers, and fast feedback input to the
PWM comparator.
8
IFB
Share Current Amp
Inverting Input
Inverting input to share current amp. Connect resistor divider between IOUT, IFB,
and IC GND pin 28 to program Share Current Amp gain.
9
IOUT
Share Current Amp
Output
Share current amplifier output and input to share adjust amplifier.
10
SHARE
Share Bus
Connect with other modules for single−wire current sharing.
11
SCOMP
Share Compensation
Connect compensation network to stabilize share loop.
12
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 program the AVP voltage or leave this
pin open for no AVP.
13
VFB
Voltage Feedback
Error Amp inverting input. Input bias current used to program AVP light load
offset via resistor connected to converter output voltage. Short VFB to the
converter output voltage for no AVP.
14
COMP
Error Amp Output and
PWM Comparator
Input
Provides loop compensation. Also used to control Softstart and Fault timing.
15
PWRGD
Power Good Output
Open collector output goes low when VFB is out of regulation. User must
externally limit current into this pin to less than 20 mA.
16−20
VID4−VID0
Voltage ID DAC
Inputs
Programs Output Voltage. 50 kΩ internal pull−up resistors to 3.3 V.
21
PWRGDS
Power Good Sense
Provides remote output voltage sensing.
22
SGND
Reference Ground
Ground connection for the DAC. Provides remote sensing of ground at the load.
23
VCC
Supply Input
IC Power Supply Input.
24
DRVON
Driver Enable
Logic High enables outputs of compatible MOSFET Driver ICs. Low turns all
MOSFETs OFF. Pin driven from internal 5.5 V; 70 kΩ internal resistor to GND.
25−27
GATE 3−1
FET Driver Outputs
PWM Signal Input to external MOSFET Gate Driver ICs.
28
GND
Ground
IC Power Supply Return; connected to IC substrate.


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