L5993D STMicroelectronics, L5993D Datasheet - Page 19

• Manufacturer Part Number: L5993D
• Description: IC PWM CONTROLLER 16 SOIC
• Manufacturer: STMicroelectronics

Specifications of L5993D

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 1MHz
• Duty Cycle: 85%
• Voltage - Supply: 11 V ~ 20 V
• Buck: No
• Boost: No
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: 0°C ~ 105°C
• Package / Case: 16-SOIC (3.9mm Width)
• Frequency-max: 1MHz
• Lead Free Status / RoHS Status: Contains lead / Request inventory verification
• Other names: 497-2387-5

Figure 43. Device shutdown on mains undervoltage.
Figure 44. Constant power ”Fine Tuning”.
Figure 45. Synchronization to flyback pulses (for monitors).
Figure 46. Switching frequency halving on absence of sync. signal (for monitor).
f
80 400V
V
IN
DC
D97IN782A
5.1
SGND
R1
C
D97IN780A
1K
VREF
1K
R1
R2
5.1V
5.1V
12
R2
4
SYNC
10K
R
L5993
4.7K
A
DC-LIM
V
13
VREF
REF
1
D97IN779A
ISEN
SGND
10
OPTIONAL
L5993
SGND
4
15
4
3
12
R
L5993
12
1
L5993
D97IN781A
SYNC
R
PGND
SENSE
12
(R
1
//R
11
SGND
2
) C>>
f
min
1
L5993
19/22