L4992 Ver la hoja de datos (PDF) - STMicroelectronics
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L4992 Datasheet PDF : 26 Pages
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L4992
ELECTRICAL CHARACTERISTICS (VIN = 12V; TJ = 25°C; VOSC = GND; unless otherwise specified.)
Symbol
Parameter
Test Condition
DC CHARACTERISTICS
VIN
Input Supply Voltage
I2
Operating Quiescent Current
I2
Stand-By Current
R5GATE = R3GATE = OPEN
H5GATE = H3GATE = OPEN
RUN3 = RUN5 = REG5
(DRIVERS OFF)
RUN3 = RUN5 = GND
VIN = 12V
VIN = 20V
+5.1V PWM CONTROLLER SECTION
V5OUT (*) V5SNS Feedback Voltage
V6 - V5
V6 - V5
V5
Over-Current Threshold Voltage
Pulse Skipping Mode
Thereshold Voltage
Over Voltage Threshold ON
V5SNS
Under Voltage Threshold ON
V5SNS
VIN = 5.5 to 20V;
VI5SNS - VV5SNS = 0 to 70mV
VSOFT5 = 4V
VIN > 6.8V
VIN < 5.8V
+3.3V PWM CONTROLLER SECTION
V3OUT (*) V3SNS Feedback Voltage
V19 - V20
V19 - V20
V20
Over Current Threshold Voltage
Pulse Skipping Mode Threshold
Voltage
Over Voltage Threshold ON
V3SNS
Under Voltage Threshold ON
V3SNS
VIN = 5.5 to 20V;
VI3SNS - VV3SNS = 0 to 70mV
VSOFT3 = 4V
VIN = 5.5 to 20V;
PWM CONTROLLERS CHARACTERISTICS (BOTH SECTIONS)
FOSC
Switching Frequency Accuracy OSC = REG5/2
OSC = 0 or REG5
V15
Voltage Range for 300kHz
Operation
TOFF
Dead Time
TOV
Overvoltage Propagation Time V5SNS to PWROK or
V3SNS to PWROK
TUV
Undervoltage Propagation Time V5SNS to PWROK or
V3SNS to PWROK
I8, I17
Soft Start Charge Current
V8, V17 Soft Start Clamp Voltage
(*) Guaranteed by design, not tested in production
Min. Typ. Max. Unit
5.5
25
V
1.35 mA
50
100
µA
60
120
4.85 5.13 5.25
V
80
100 120 mV
14
26
38
mV
7
13
19
mV
5.35 5.55 5.77
V
4.54 4.69 4.87
V
3.285 3.39 3.495 V
80
100 120 mV
14
26
38
mV
3.55 3.7 3.85
V
3.02 3.14 3.27
V
255 300 345 kHz
170 200 230 kHz
2.4
2.6
V
300 375 450
ns
1.25
µs
1.5
µs
3.2
4
4.8
µA
4
V
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