參數(shù)資料
型號: P95020NQG8
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: 電源管理
英文描述: 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC132
封裝: 10 X 10 MM, 0.85 MM HEIGHT, QFN-132
文件頁數(shù): 17/169頁
文件大?。?/td> 4297K
代理商: P95020NQG8
IDTP95020
Product Datasheet
September 2, 2011 Revision 1.3 Final
113
2011 Integrated Device Technology, Inc.
Class D – Register Settings
Register pair (0x8A, 0x8C) and register pair (0x8B, 0x8D) control and monitor the CLASS_D BTL Power Output Stage. Each
half-bridge can be programmed by writing 8-bit control words to these registers.
Both Registers in each pair must be programmed identically. The Base addresses are defined in Table 11 – Register Address
Global Mapping on Page 16. The offset addresses are defined as Base Address in the following table.
Control Registers:
This Register pair contains Enable, Short Circuit Threshold and Dead-Time settings. They must be set identically.
IC Address = Page-0: 138(0x8A), C Address = 0xA08A
IC Address = Page-0: 140(0x8C), C Address = 0xA08C
Table 174. Class D Control Registers
BIT
BIT NAME
DEFAULT
SETTING
USER
TYPE
VALUE
DESCRIPTION / COMMENTS
[1:0] RESERVED
01b
RW
RESERVED
[3:2] SCTHR_CLASS_D
01b
RW
(See Table 175) Short Circuit Threshold
[6:4] RESERVED
000b
RW
RESERVED
7
ENABLE_CLASS_D 0b
RW
1 = Enable
0 = Disable
Master Enable
Table 175. Peak Short Circuit Detect Level Settings for Bits [3:2]
BIT 3 BIT 2 DESCRIPTION
0
Short Circuit Threshold = 10% of F/S Voltage
0
1
Short Circuit Threshold = 14% of F/S Voltage
1
0
Short Circuit Threshold = 16% of F/S Voltage
1
Short Circuit Threshold = 20% of F/S Voltage
Note: Short Circuit detect threshold is set as a percentage of full scale output voltage.
Operation Registers:
This Register pair contains Short Circuit Disable and Fault settings. They must be set identically.
IC Address = Page-0: 139(0x8B), C Address = 0xA08B
IC Address = Page-0: 141(0x8D), C Address = 0xA08D
Table 176. Class D Operation Registers
BIT
BIT NAME
DEFAULT
SETTING
USER
TYPE
VALUE
DESCRIPTION / COMMENTS
[3:0] RESERVED
0h
RW
RESERVED
4
FAULT_CLASS_D
0b
R
1 = Fault
0 = No Fault
Short Circuit Detected
5
RESERVED
0b
R
RESERVED
6
SC_DISABLE_CLASS_D 0b
RW
1 = Disable SC Protect
0 = Normal SC Protect
Disable Short Circuit Protection
7
RESERVED
0b
RW
RESERVED
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