L5991A STMicroelectronics, L5991A Datasheet - Page 17

• Manufacturer Part Number: L5991A
• Description: IC CTRLR PRIMARY BCD 16-DIP
• Manufacturer: STMicroelectronics

Specifications of L5991A

• 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: 8.2 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
• 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: 497-5722

Figure 35. Standby thresholds adjustment.
Figure 36. Isolated MOSFET Drive & Current Transformer Sensing in 2-switch Topologies.
Figure 37. Low consumption start-up.
Figure 38. Bipolar transistor driver.
PGND
20V
L5991
12
11
SGND
9
2.2M
V
C
47K
D97IN762B
10
13
L5991
SGND
V
8
REF
D97IN751A
OUT
ISEN
V
CC
VREF
12
4
12
4
L5991
V
L5991
V
9
11
PGND
8
IN
C
R
STD1NB50-1
A
V
10
13
11
33K
CC
13
OUT
ISEN
BOUNDARY
ISOLATION
D97IN763
ISEN
10
OPTIONAL
R
D97IN761
V
T
IN
R
SELF-SUPPLY
SENSE
WINDING
V
IN
L5991 - L5991A
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