IRS20954SPBF International Rectifier, IRS20954SPBF Datasheet - Page 13

• Manufacturer Part Number: IRS20954SPBF
• Description: IC AMP DGTL AUDIO PROT 16-SOIC
• Manufacturer: International Rectifier
• Type: MOSFET Driverr

Specifications of IRS20954SPBF

• Applications: Amplifiers, Receivers
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

For the negative load current, low-side over-current sensing monitors over load condition and shutdown the switching operation
if the load current exceeds the preset trip level.
The low-side current sensing is based on measurement of V
current value due to overshoot , V
OCSET pin is to program the threshold for low-side over-current sensing. The threshold voltage at V
protection is the same as the voltage applied to the OCSET pin to COM. It is recommended to use V
voltage to a resistive divider, R4 and R5, generating a voltage to OCSET for better immunity against V
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Low-side Over-Current Sensing
LEVEL
SHIFT
HV
FLOATING HIGH SIDE
5V REG
DEAD TIME
SD
Not recommended for new designs.
HIGH
SIDE
CS
REF
OC
S
DETECT
sensing ignores the first 200 ns signal after LO turned on.
Please use IRS20957SPBF.
DETECT
UV
Figure 12: Bi-Directional Over-Current Protection
UV
UV
OCREF
COM
LEVEL
5.1V
SHIFT
HV
Q
R4
R5
LOW SIDE CS
0.5mA
OCSET
OC Comparator
+
-
IRS20954
DS
VCC
LO
CSH
VB
HO
VS
LO
COM
OCSET
OC
VREF
during the low-side MOFET on state. In order to avoid incorrect
R3
VS
LO
Cbs
R2
R5
R4
R1
Dbs
Q2
Q1
D1
+B
-B
IRS20954SPBF
OUT
Q2
Q1
+B
Vcc
-B
CC
REF
S
fluctuations.
pin turning on the OC
to supply a reference
OUT
13