L5991A(1999) Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
Fabricante
L5991A Datasheet PDF : 19 Pages
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L5991 - L5991A
ABSOLUTE MAXIMUM RATINGS
Symbol
VCC
IOUT
Ptot
Tj
Tstg
Parameter
Supply Voltage (ICC < 50mA) (*)
Output Peak Pulse Current
Analog Inputs & Outputs (6,7)
Analog Inputs & Outputs (1,2,3,4,5,15,14, 13, 16)
Power Dissipation @ Tamb = 70°C (DIP16)
@ Tamb = 50°C (SO16)
Junction Temperature, Operating Range
Storage Temperature, Operating Range
(*) maximum package power dissipation limits must be observed
PIN CONNECTION
Value
selflimit
1.5
-0.3 to 8
-0.3 to 6
1
0.83
-40 to 150
-55 to 150
Unit
V
A
V
V
W
W
°C
°C
SYNC
1
RCT
2
DC
3
VREF
4
VFB
5
COMP
6
SS
7
VCC
8
16
ST-BY
15
DC-LIM
14
DIS
13
ISEN
12
SGND
11
PGND
10
OUT
9
VC
THERMAL DATA
Symbol
Rth j-amb
Parameter
Thermal Resistance Junction -Ambient (DIP16)
Thermal Resistance Junction -Ambient (SO16)
PIN FUNCTIONS
Value
80
120
Unit
°C/W
°C/W
N.
Name
Fun ction
1
SYNC Synchronization. A synchronization pulse terminates the PWM cycle and discharges Ct
2
RCT
Oscillator pin for external CT, RA, RB components
3
DC
Duty Cycle control
4
VREF 5.0V +/-1.5% reference voltage @ 25°C
5
VFB
Error Amplifier Inverting input
6
COMP Error Amplifier Output
7
SS
Soft start pin for external capacitor Css
8
VCC
Supply for internal ”Signal” circuitry
9
VC
Supply for Power section
10
OUT
High current totem pole output
11
PGND Power ground
12
SGND Signal ground
13
ISEN
Current sense
14
DIS
Disable. It must never be left floating. TIE to SGND if not used.
15
DC-LIM Connecting this pin to Vref, DC is limited to 50%. If it is left floating or grounded no limitation is
imposed
16
ST-BY Standby. Connect a resistor to RCT. Connect to VREF or floating if not used.
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