IR1167ASPBF International Rectifier, IR1167ASPBF Datasheet - Page 8
![no-image](/images/manufacturer_photos/0/3/338/international_rectifier_sml.jpg)
IR1167ASPBF
Manufacturer Part Number
IR1167ASPBF
Description
IC MOSFET DRIVER N-CHAN 8-SOIC
Manufacturer
International Rectifier
Series
SmartRectifier™r
Datasheet
1.IR1167ASPBF.pdf
(16 pages)
Specifications of IR1167ASPBF
Configuration
Low-Side
Input Type
Self Oscillating
Delay Time
60ns
Current - Peak
2A
Number Of Configurations
1
Number Of Outputs
1
Voltage - Supply
12 V ~ 18 V
Operating Temperature
-25°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Part Status
Active and Preferred
Package
8-Pin SOIC(NB)
Circuit
Switching Regulator Controller
Topology
Flyback / Resonant Half-Bridge
Current Mode
Discontinuous / Critical / Continuous
Vcc (min)
11.4
Vcc (max)
18
Vout (max)
200
Iout (a)
+2 / -7
Switch Freq (khz)
up to 500kHz
Vgate Clamp (v)
10.7
Programmability
MOT / OVT
Enable Pin
Yes
Isleep (ua)
200
Automatic Mot Protection
No
Pbf
PbF Option Available
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
High Side Voltage - Max (bootstrap)
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
cycle of the SR MOSFET and, as a consequence, the
max duty cycle of the primary side switch.
DCM/CrCM Turn-off phase
Once the SR MOSFET has been turned on, it will
remain on until the rectified current will decay to the
level where V
This will happen differently depending on the mode
of operation.
In DCM the current will cross the threshold with a
relatively low dI/dt. Once the threshold is crossed, the
current will start flowing again through the body diode,
causing the V
on the amount of residual current, V
once again the turn on threshold: for this reason V
www.irf.com
V
V
V
V
I
I
I
I
PRIM
PRIM
PRIM
SEC
SEC
PRIM
SEC
SEC
Primary and secondary currents and
Primary and secondary currents and
T1
T1
voltages for CrCM mode
voltages for DCM mode
DS
DS
T2
will cross the turn-off threshold V
voltage to jump negative. Depending
T2
T3
DS
may trigger
time
time
TH1
time
time
TH2
.
is blanked for a certain amount of time (T
V
The blanking time is internally set. As soon as V
crosses the positive threshold V
time is terminated and the IC is ready for next
conduction cycle.
CCM Turn-off phase
In CCM mode the turn off transition is much steeper
and dI/dt involved is much higher. The turn on phase
is identical to DCM or CrCM and therefore won’t be
repeated here.
During the SR FET conduction phase the current will
decay linearly, and so will VDS on the SR FET.
Once the primary switch will start to turn back on, the
SR FET current will rapidly decrease crossing V
and turning the gate off.
The turn off speed is critical to avoid cross conduction
on the primary side and reduce switching losses.
also in this case a blanking period will be applied, but
given the very fast nature of this transition, it will be
reset as soon as V
TH1
V
V
I
I
PRIM
SEC
SEC
PRIM
Primary and secondary currents and
has been triggered.
T1
voltages for CCM mode
T2
DS
crosses V
IR1167AS/BS
TH3
TH3
.
also the blanking
BLANK
) after
time
time
TH1
DS
8