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L5994A датащи(PDF) 3 Page - STMicroelectronics

номер детали L5994A
подробное описание детали  ADJUSTABLE TRIPLE OUTPUT POWER SUPPLY CONTROLLER
PDF  26 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L5994A датащи(HTML) 3 Page - STMicroelectronics

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L5994 - L5994A
BLOCK DIAGRAM
ELECTRICAL CHARACTERISTICS (Vin = 12V; Tj = 25°C; Vosc = GND; unless otherwise specified.)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
DC CHARACTERISTIC
Vin
Input supply voltage
V1out,4V
4.75
25
V
I2
Operating quiescent current
R1GATE= R2GATE = OPEN
H1GATE = H2GATE = OPEN
RUN1= RUN2 = SREG5
(DRIVERS OFF)
1.1
1.4
mA
I2
Stand by current
RUNQ=RUN2=GND
NOSKIP=GND
Vin=12V
Vin=20V
50
60
90
100
µA
µA
SECTION 1 PWM CONTROLLER
V1out
V1SNS feedback voltage
Vin = 5V to 20V
NOSKIP = REG5
Vi1sns-Vv1sns = 0 to 40mA
1.81
1.89
1.97
V
V6-V5
Overcurrent Threshold current
VSOFT1 = 3.1V
37
50
63
mV
V6-V5
Pulse skipping mode threshold
voltage
Vin > 6.8V
Vin < 5.8V
13
6.5
mV
mV
SLOPE
+
-
+
-
+
-
∑
ERROR SUMMING
I1SNS
V1SNS
6
5
VREF
7
COMP1
1
32
31
H1STRAP
H1GATE
H1SRC
30
R1GATE
Hside
Lside
LOGIC
AND
SHOOT-
THROUGH
CONTROL
OVER CURRENT
COMPARATOR
ZERO CROSSING
COMPARATOR
PULSE SKIPPING
COMPARATOR
+
-
+
-
+
-
SOFT
I1SNS
V1SNS
8
SOFT1
SLOPE
+
-
+
-
+
-
∑
ERROR SUMMING
I2SNS
V2SNS
19
20
VREF
18
COMP2
24
25
26
H2STRAP
H2GATE
H2SRC
27
28
R2GATE
PGND
Hside
Lside
LOGIC
AND
SHOOT-
THROUGH
CONTROL
OVER CURRENT
COMPARATOR
ZERO CROSSING
COMPARATOR
PULSE SKIPPING
COMPARATOR
+
-
+
-
+
-
SOFT
I2SNS
V2SNS
17
SOFT2
LINEAR
REGULATOR
SWITCH
COMPARATOR
V5SW
4.7V
W5SW
PREG5
29
SREG5
3
4
2
VIN
VREF
VREF BUFFER
OVERVOLT
COMPARATOR
UNDERVOLT
COMPARATOR
POWER MANAGEMENT
&
SYSTEM SUPERVISOR
12
VREF
13
SGND
+
-
16
11
10
14
9
RUN2
RUN1 PWROK1
NOSKIP
CRST
VDRLIN
21
+
-
VFBLIN
22
VREF
OSCILLATOR &
SYNCHRONIZATION
OSC
15
REG12
LDO
D98IN864A
+
-
REG5
PREG5
23
PWROK2



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