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IC BLOCK DIAGRAMS AND TERMINAL DESCRIPTIONS-4
Q5017, Q5018 : IRS20954S (Digital Audio Driver)
BLOCK DIAGRAM
VDD
IN
10.4V
VSS
CHARGE/
DISCHARGE
CSD
PROTECTION
CONTROL
TERMNAL DESCRIPTION
Pin No.
Pin Name
1
VDD
2
CSD
3
IN
4
VSS
5
NC
6
VREF
7
OCSET
8
DT
9
COM
10
LO
11
VCC
12
NC
13
VS
14
HO
15
VB
16
CSH
FLOATING INPUT
UV
DETECT
INPUT
LOGIC
HV
LEVEL
SHIFT
HV
LEVEL
SHIFT
HV
LEVEL
SHIFT
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.
UV
DETECT
UV
HIGH
Q
SIDE
CS
HV
HV
FLOATING HIGH SIDE
LEVEL
LEVEL
SHIFT
SHIFT
5V REG
UV
DETECT
DEAD TIME
SD
DT
LOW SIDE CS
5.1V REFERENCE
A-9355
CSH
VB
HO
VS
VCC
LO
COM
OCSET
VREF
DT
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