L5991 STMicroelectronics, L5991 Datasheet - Page 19

• Manufacturer Part Number: L5991
• Description: IC PRIMARY CTRLR W/STANDBY 16DIP
• Manufacturer: STMicroelectronics

Specifications of L5991

• Mfg Application Notes: 25W Off-Line Battery Charger with L5991A AppNote 300W Forward Converter with L5991A AppNote 45W AC-DC Adapter with Standby AppNote 60W Power Supply using the L5991 AppNote 80W Adapter using L6561/L5991A AppNote 90W SMPS for Monitors with Standby AppNote Trick Enhances L5991s Standby Function AppNote L5991-Based Converter, Temp Extra Power AppNote Auxiliary Power Supply Design AppNote Minimize Power Losses AppNote
• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 1MHz
• Duty Cycle: 93%
• Voltage - Supply: 11 V ~ 20 V
• Buck: No
• Boost: Yes
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: 0°C ~ 105°C
• Package / Case: 16-DIP (0.300", 7.62mm)
• Frequency-max: 1MHz
• Duty Cycle (max): 93 %
• Output Voltage: 5.075 V
• Output Current: 1500 mA
• Mounting Style: Through Hole
• Switching Frequency: 1000 KHz
• Operating Supply Voltage: 12 V to 20 V
• Maximum Operating Temperature: + 150 C
• Fall Time: 35 ns
• Minimum Operating Temperature: - 40 C
• Rise Time: 70 ns
• Synchronous Pin: Yes
• Topology: Boost, Flyback
• Package: DIP16 AND SO16
• For Use With: 497-8226 - BOARD EVAL L5991/STP12NK80Z497-6416 - BOARD EVAL L5991/STP10NK60Z497-5083 - EVAL BOARD 3PH PWR SUPPLY W/ESBT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-7251-5; L5991

Figure 42. Protection against overvoltage/feedback disconnection (latched)
Figure 43 Protection against overvoltage/feed-
Figure 45. Constant power in pulse-by-pulse current limitation (flyback discontinuous)
Figure 46. Voltage mode operation.
back disconnection (not latched)
DIS
VREF
DC
14
R
12
START
V
PGND
CC
4
3
L5991
SGND
R
80
START
12
8
V
CC
L5991
V
400V
11
11
8
IN
L5991
PGND
D97IN754
OUT
SGND
11
DC
D97IN755A
10
12
13
10K
COMP
ISEN
DC
SGND
3
6
R
FF
L5991
12
R
Figure 44. Device shutdown on overcurrent
PGND
D97IN758A
L p
13
L5991
11
ISEN
V
SGND
Z
R SENSE
R
2.2K
12
FF
DIS
14
13
= 6·10
4
OPTIONAL
D97IN757
14
VREF
DIS
ISEN
R
12
START
6
V
CC
L5991
SGND
R SENSE
8
R·L p
R
1
11
D97IN756A
PGND
D98IN905
I
pk max
L5991 - L5991A
R
2
R
R
SENSE
I
SENSE
2.5
I
1-
pk
19/23
R
R
2
1