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CS51022AEDR16G Fiches technique(PDF) 5 Page - ON Semiconductor

No de pièce CS51022AEDR16G
Description  Enhanced Current Mode PWM Controller
Download  11 Pages
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Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS51022AEDR16G Fiches technique(HTML) 5 Page - ON Semiconductor

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CS51021A, CS51022A, CS51023A, CS51024A
http://onsemi.com
5
ELECTRICAL CHARACTERISTICS (Unless otherwise stated, specifications apply for −40
°C < TA < 85°C, −40°C < TJ < 150°C,
3.0 V < VC < 20 V, 8.2 V < VCC < 20 V, RT = 12 kW, CT = 390 pF)
Characteristic
Unit
Max
Typ
Min
Test Conditions
Current Sense
OFFSET Voltage
(Note 4)
0.09
0.10
0.11
V
Blanking Time
55
160
ns
Blanking Disable Voltage
Adjust VFB
1.8
2.0
2.2
V
Second Current Threshold Gain
1.21
1.33
1.45
V/V
ISENSE Input Resistance
5.0
k
W
Minimum On Time
GATE High to Low
30
70
110
ns
Gain
(Note 4)
0.78
0.80
0.82
V/V
OV & UV Voltage Monitors
OV Monitor Threshold
2.4
2.5
2.6
V
OV Hysteresis Current
−10
−12.5
−15
mA
UV Monitor Threshold
1.38
1.45
1.52
V
UV Monitor Hysteresis
25
75
100
mV
SOFT START (SS)
Charge Current
SS = 2.0 V
−70
−55
−40
mA
Discharge Current
SS = 2.0 V
250
1000
mA
Charge Voltage, VSS
4.4
4.7
5.0
V
Discharge Voltage, VSS
0.25
0.27
0.30
V
4. Guaranteed by design, not 100% tested in production.
PACKAGE PIN DESCRIPTION
PIN #
PIN SYMBOL
FUNCTION
16 Lead SO Narrow
1
GATE
External power switch driver with 1.0 A peak capability.
2
ISENSE
Current sense amplifier input.
3
SYNC (CS51021A/3A)
Bi−directional synchronization. Locks to the highest frequency.
3
SLEEP (CS51022A/4A)
Active high chip disable. In sleep mode, VREF and GATE are turned off.
4
SLOPE
Additional slope to the current sense signal. Internal current source charges the external capacitor.
5
UV
Undervoltage protection monitor.
6
OV
Overvoltage protection monitor.
7
RTCT
Timing resistor RT and capacitor CT determine oscillator frequency and maximum duty cycle, DMAX.
8
ISET
Voltage at this pin sets pulse−by−pulse overcurrent threshold, and second threshold (1.33 times
higher) with Soft Start retrigger (hiccup mode).
9
VFB
Feedback voltage input. Connected to the error amplifier inverting input.
10
COMP
Error amplifier output. Frequency compensation network is usually connected between COMP and
VFB pins.
11
SS
Charging external capacitor restricts error amplifier output voltage during the start or fault
conditions (hiccup).
12
LGND
Logic ground.
13
VREF
5.0 V reference voltage output.
14
VCC
Logic supply voltage.
15
PGND
Output power stage ground connection.
16
VC
Output power stage supply voltage.


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