A-9355
IC BLOCK DIAGRAMS AND TERMINAL DESCRIPTIONS-4
Q5017, Q5018 : IRS20954S (Digital Audio Driver)
BLOCK DIAGRAM
TERMNAL DESCRIPTION
UV
DETECT
INPUT
LOGIC
HV
LEVEL
SHIFT
HV
LEVEL
SHIFT
UV
DETECT
HIGH
SIDE
CS
UV
5V REG
UV
DETECT
DEAD TIME
PROTECTION
CONTROL
LOW SIDE CS
5.1V REFERENCE
HV
LEVEL
SHIFT
HV
LEVEL
SHIFT
HV
LEVEL
SHIFT
CHARGE/
DISCHARGE
10.4V
CSH
VB
HO
VS
VCC
LO
COM
OCSET
VREF
DT
VDD
IN
VSS
CSD
SD
DT
20.8V
20.8V
FLOATING HIGH SIDE
FLOATING INPUT
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Name
VDD
CSD
IN
VSS
NC
VREF
OCSET
DT
COM
LO
VCC
NC
VS
HO
VB
CSH
Description
Floating input positive supply.
Shutdown timing capacitor, referenced to VSS.
PWM non-inverting input, in phase with HO.
Floating input supply return.
---
5V reference output for setting OCSET.
Low side over-current threshold setting, referenced to COM.
Input for programmable deadtime, referenced to COM.
Low side supply return.
Low side output.
Low side logic supply.
---
High side floating supply return.
High side output.
High side floating supply.
High side over-current sensing input, referenced to VS.
Q
