L5991AD STMicroelectronics, L5991AD Datasheet - Page 6

• Manufacturer Part Number: L5991AD
• Description: IC PRIMARY CTRLR W/STANDBY SO16
• Manufacturer: STMicroelectronics

Specifications of L5991AD

• 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-SOIC (3.9mm Width)
• Frequency-max: 1MHz
• Output Voltage: 5.075 V
• Output Current: 1 A
• Input Voltage: 2.42 V to 2.58 V
• Switching Frequency: 1 MHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• 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

Figure 11. Output saturation.
L5991 - L5991A
Figure 9. Vref vs. junction temperature.
Vref [V]
5.05
4.95
16
14
12
10
Figure 13. UVLO Saturation
6/23
50
40
30
20
10
Ipin10 [mA]
5.1
4.9
8
6
0
5
-50
0
Vsat = V
0
-25
200
before turn-on
Vcc < Vccon
0.2
10
[V]
Vcc = 15V
Iref= 20mA
0
400
0.4
25
Vpin10 [mV]
600
Isource [A]
Tj (°C)
0.6
50
Vcc = Vc = 15V
Tj = 25°C
800
75
0.8
1,000 1,200 1,400
100
1
125
150
1.2
Figure 10. Vref SVRR vs. switching frequency.
Figure 12. Output saturation.
Figure 14. Timing resistor vs. switching frequency.
2.5
1.5
0.5
SVRR (dB)
120
5000
2000
1000
fsw (KHz)
80
40
2
1
0
500
200
100
0
50
20
10
1
0
V sat = V
0.2
Vc c = Vc = 15V
10
T j = 25°C
10
10
[V]
5.6nF
0.4
100
Rt (kohm)
Isink [A ]
fsw (Hz)
Vcc
Tj = 25°C
0.6
20
2.2nF
= 15V, V15 =0V
1000
0.8
30
Vcc=15V
Vp-p=1V
10000
1
100pF
220pF
470pF
1nF
1.2
40