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IR3651SPBF Datasheet(PDF) 5 Page - International Rectifier

Part No. IR3651SPBF
Description  HIGH VOLTAGE SYNCHRONOUS PWM BUCK CONTROLLER
Download  19 Pages
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Maker  IRF [International Rectifier]
Homepage  http://www.irf.com
Logo IRF - International Rectifier

IR3651SPBF Datasheet(HTML) 5 Page - International Rectifier

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IR3651SPbF
10/11/2006
Recommended Operating Conditions
Parameter
SYM
Test Condition
Min
TYP
MAX
Unit
s
Reference Voltage
Feedback Voltage
VFB
1.25
V
0
oC<Tj<125oC
-1.5
+1.5
%
Accuracy
-40
oC<Tj<125oC, Note1
-3
+1.5
%
Fb Voltage Line Regulation
LREG
5V<Vcc<12V
2.0
mV
Supply Current
VCC Supply Current (Stat)
ICC(Static)
SS=0V, No Switching
6
7
mA
VCC Supply Current (Dyn)
ICC(Dynamic)
Fs=200kHz, CLOAD=1.5nF
6
7
mA
DRVcc Supply Current (Stat)
IC(Static)
SS=0V, No Switching
0.3
0.5
mA
DRVcc Supply Current (Dyn)
IC(Dynamic)
Fs=200kHz, CLOAD=1.5nF
4
5
mA
Vb Supply Current (Stat)
Ib(Static)
SS=0V, No Switching
0.3
0.5
mA
Vb Supply Current (Dyn)
Ib(Dynamic)
Fs=200kHz, CLOAD=1.5nF
4.5
5.5
mA
Under Voltage Lockout
VCC-Start-Threshold
VCC_UVLO(R)
Supply ramping up
4.0
4.17
4.35
V
VCC-Stop-Threshold
VCC_UVLO(F)
Supply ramping down
3.75
4.1
V
VCC-Hysteresis
Supply ramping up and down
0.15
0.25
0.3
V
DRVcc-Start-Threshold
DRcc_UVLO(R)
Supply ramping up
8.3
9
9.7
V
DRVcc-Stop-Threshold
DRVcc_UVLO(F)
Supply ramping down
7.5
8.2
8.9
V
DRVCc-Hysteresis
Supply ramping up and down
0.6
0.9
V
Vb-Start-Threshold
Vb_UVLO(R)
Supply ramping up
8.3
9
9.7
V
Vb-Stop-Threshold
Vb_UVLO(F)
Supply ramping down
7.5
8.2
8.9
V
Vb-Hysteresis
Supply ramping up and down
0.6
0.9
V
Oscillator
Frequency
FS
Rt=120K
Rt=51K
170
340
200
400
230
460
kHz
Ramp Amplitude
Vramp
Note2
1.25
V
Min Duty Cycle
Dmin
Fb=2V
0
%
Min Pulse Width
Dmin(ctrl)
Fs=200kHz, Note2
200
ns
Max Duty Cycle
Dmax
Fs=200kHz, Fb=1.2V
Fs=400kHz, Fb=1.2V
80
70
%
Sync Frequency Range
Sync(Fs)
20% above free running freq
480
kHz
Sync Pulse Duratin
Sync(puls)
200
ns
Sync high Level Threshold
Sync(H)
2
V
Sync Low Level Threshold
Sync(L)
0.8
V
Electrical Specifications
Unless otherwise specified, these specifications apply over V
cc=5V; DRVcc=Vb=12V, 0
oC<T
j< 125
oC
5
Symbol
Definition
Min
Max
Units
Vbus
Converting Voltage
12
75
V
Vcc
Supply Voltage
4.5
13.2
V
DRVcc
Supply Voltage
10
16
V
Vb to Vs
Supply Voltage
10
16
V
Fs
Operating Frequency
100
400
kHz
Tj
Junction Temperature
-40
125
oC


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