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CS51022ADBG

P1-P3P4-P6P7-P9P10-P11
CS51021A, CS51022A, CS51023A, CS51024A
http://onsemi.com
4
ELECTRICAL CHARACTERISTICS (Unless otherwise stated, specifications apply for −40°C < T
A
< 85°C, −40°C < T
J
< 150°C,
3.0 V < V
C
< 20 V, 8.2 V < V
CC
< 20 V, R
T
= 12 kW, C
T
= 390 pF)
Characteristic UnitMaxTypMinTest Conditions
Oscillator
Accuracy R
T
= 12 k, C
T
= 390 pF 230 255 280 kHz
Voltage Stability Delta Frequency 8.2 V < V
CC
< 20 V − 2.0 3.0 %
Temperature Stability T
MIN
< T
A
< T
MAX,
(Note 3) − 8.0 − %
Min Charge & Discharge Time (Note 3) 0.333 − −
ms
Duty Cycle Accuracy R
T
= 12 k, C
T
= 390 pF 70 77 83 %
Peak Voltage (Note 3) − 3.0 − V
Valley Voltage (Note 3) − 1.5 − V
Valley Clamp Voltage 10 k Resistor to ground on R
T
C
T
1.2 1.4 1.6 V
Discharge Current − 0.8 1.0 1.2 mA
Discharge Current TA = 25°C, Note 3 0.925 1.0 1.075 mA
Synchronization (CS51021A/3A)
Input Threshold − 1.0 1.5 2.7 V
Output Pulsewidth − 160 260 400 ns
Output High Voltage
I
SYNC
= 100 mA
3.5 4.3 4.8 V
Input Resistance (Note 3) 35 70 140
kW
Drive Delay SYNC to GATE RESET 80 120 150 ns
Output Drive Current 1.0 k Load 1.25 2.0 3.5 mA
SLEEP (CS51022A/4A)
SLEEP Input Threshold Active High 1.0 1.5 2.7 V
SLEEP Input Current V
SLEEP
= 4.0 V 11 25 46
mA
I
CC
@ SLEEP V
CC
≤ 15 V − 50 100
mA
GATE Driver
HIGH Voltage Measure V
C
− GATE, V
C
= 10 V, 150 mA Load − 1.5 2.2 V
LOW Voltage Measure GATE − PGND, 150 mA SINK − 1.2 1.5 V
HIGH Voltage Clamp V
C
= 20 V, 1.0 nF 11 13.5 16 V
LOW Voltage Clamp Measured at 10 mA Output Current − 0.6 0.8 V
Peak Current V
C
= 20 V, 1.0 nF, (Note 3) − 1.0 − A
UVL Leakage V
C
= 20 V measured at 0 V − −1.0 −50
mA
RISE Time Load = 1.0 nF, 1.0 V < GATE < 9.0 V,
V
C
= 20 V, T
A
= 25°C
− 60 100 ns
FALL Time Load = 1.0 nF, 9.0 V > GATE > 1 .0 V,
V
C
= 20 V
− 15 40 ns
SLOPE Compensation
Charge Current SLOPE = 2.0 V −63 −53 −43
mA
COMP Gain Fraction of slope voltage added to I
SENSE
,
(Note 3)
0.095 0.100 0.105 V/V
Discharge Voltage SYNC = 0 V − 0.1 0.2 V
3. Guaranteed by design, not 100% tested in production.
CS51021A, CS51022A, CS51023A, CS51024A
http://onsemi.com
5
ELECTRICAL CHARACTERISTICS (Unless otherwise stated, specifications apply for −40°C < T
A
< 85°C, −40°C < T
J
< 150°C,
3.0 V < V
C
< 20 V, 8.2 V < V
CC
< 20 V, R
T
= 12 kW, C
T
= 390 pF)
Characteristic UnitMaxTypMinTest Conditions
Current Sense
OFFSET Voltage (Note 4) 0.09 0.10 0.11 V
Blanking Time − − 55 160 ns
Blanking Disable Voltage Adjust V
FB
1.8 2.0 2.2 V
Second Current Threshold Gain − 1.21 1.33 1.45 V/V
I
SENSE
Input Resistance − − 5.0 −
kW
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, V
SS
− 4.4 4.7 5.0 V
Discharge Voltage, V
SS
− 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 I
SENSE
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, V
REF
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 R
T
C
T
Timing resistor R
T
and capacitor C
T
determine oscillator frequency and maximum duty cycle, D
MAX.
8 I
SET
Voltage at this pin sets pulse−by−pulse overcurrent threshold, and second threshold (1.33 times
higher) with Soft Start retrigger (hiccup mode).
9 V
FB
Feedback voltage input. Connected to the error amplifier inverting input.
10 COMP Error amplifier output. Frequency compensation network is usually connected between COMP and
V
FB
pins.
11 SS
Charging external capacitor restricts error amplifier output voltage during the start or fault
conditions (hiccup).
12 LGND Logic ground.
13 V
REF
5.0 V reference voltage output.
14 V
CC
Logic supply voltage.
15 PGND Output power stage ground connection.
16 V
C
Output power stage supply voltage.
CS51021A, CS51022A, CS51023A, CS51024A
http://onsemi.com
6
D
2
Start
+
−
Stop
SS
+
−
Clamp
E/A
+
−
I
SET
−
+
Clamp
D
3
D
1
20 k
10 k
V
FB
−
+
Monitor
G
4
PWM
−
+
Comp
55 ns
Blank
Σ
I
SENSE
S
LOPE
V
FB
C
OMP
R
T
C
T
2nd
+
−
Threshold
OV
+
−
Monitor
DISABLE
0.1
0.8
Q
2
1.33
53 mA
I
SET
OV
12.5 mA
V
REF
2.5 V
+
−
+
−
2.0 V
+
−
2.5 V
V
REF
V
ISENSE
SS
−
+
Monitor
Discharge
Latch
UV
−
+
Monitor
1.45 V
+
−
4.7 V
+
−
S
R
Q
F
1
G
1
G
2
D
4
ZD
1
13.5 V
V
C
GATE
PGND
SS
UV
G
3
FAULT
55 mA
V
REF
OSC
SYNC
4.3 V
200 ns
−
+
V
REF
_OK
+
−
4.75 V
V
REF
= 5.0 V
+−
+−
0.1 V
V
CC
_OK
V
REF
S
LEEP
LGND
V
CC
Figure 2. Block Diagram
P1-P3P4-P6P7-P9P10-P11

CS51022ADBG

Mfr. #:
Buy CS51022ADBG
Manufacturer:
ON Semiconductor
Description:
Switching Controllers ANA ENHANCED PWM CTRL
Lifecycle:
New from this manufacturer.
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