L6591 STMicroelectronics, L6591 Datasheet - Page 34

• Manufacturer Part Number: L6591
• Description: IC CTRLR PWM PROG CM HV 16SOIC
• Manufacturer: STMicroelectronics

Specifications of L6591

• Output Isolation: Isolated
• Frequency Range: 168 ~ 192kHz
• Voltage - Input: 8.7 ~ 22 V
• Power (watts): 750mW
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Output Voltage: 5 V
• Input Voltage: 25 V
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 50 %
• For Use With: 497-8335 - BOARD EVAL FOR L6591
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8286

Summary of L6591 power management functions
7
Table 5.
Table 6.
34/41
Short circuit
Burst mode
Protection
protection
Adaptive
Feature
UVLO
OLP
Summary of L6591 power management functions
It has been seen that the device is provided with a number of power management functions:
different operating mode upon loading conditions, protection functions, as well as interaction
with the PFC pre-regulator. To help the designer familiarize with these functions, in the
following tables all of theme are summarized with their respective activation mechanism and
the resulting status of the most important pins. This can be useful not only for a correct use
of the IC but also for diagnostic purposes: especially at prototyping/debugging stage, it is
quite common to bump into unwanted activation of some function, and these tables can be
used as a sort of quick troubleshooting guide.
Light load management
Protections
consumption
operation for
Vcc range at
Output short
Description Caused by
Description Caused by
at light load
Controlled
low power
protection
protection
Extended
light load
ON-OFF
overload
Output
circuit
V
V
V
V
V
V
V
V
V
V
V
V
COMPBon
V
V
V
V
COMP
COMP
V
V
V
V
COMP
COMP
COMP
COMP
COMPL
COMPH
COMPH
COMPH
COMPH
SSLAT
SSLAT
SSDIS
SSDIS
SS
SS
SS
SS
>
>
>
>
<
<
=
=
=
=
behavior
restart
restart
behavior
operation
threshold
reduction
Latched
Latched
skipping
UVLO
Pulse
Auto
Auto
IC
IC
Doc ID 14821 Rev 5
(1)
(1)
restart
restart
N.A.
N.A.
Vcc
Vcc
[V]
[V]
13
13
5
5
[mA]
Consumption
IC Iq
0.35
max
0.35
max
1.2
1.2
2 mA max
V
V
COMPBon
COMP
when
[mA]
N.A.
VREF
[V]
5
0
5
0
<
N.A.
N.A.
N.A.
N.A.
SS
PFC_STOP
Active (low)
No change
V
V
COMPBon
COMP
when
V
COMP
[V]
0
0
0
0
<
change
change
OSC
Stop
Stop
Stop
Stop
[V]
SS
No
No
PFC_STOP
Active (low)
Active (low)
Active (low)
Active (low)
V
V
Stopped
COMPBon
COMP
when
OSC
Run
L6591
<