參數(shù)資料
型號: L6460TR
廠商: STMICROELECTRONICS
元件分類: 運動控制電子
英文描述: STEPPER MOTOR CONTROLLER, PQFP64
封裝: 10 X 10 MM, 1 MM HEIGHT, ROHS COMPLIANT, TQFP-64
文件頁數(shù): 87/139頁
文件大?。?/td> 3837K
代理商: L6460TR
L6460
Main switching regulator
Doc ID 17713 Rev 1
51/139
Figure 11.
Main switching regulator functional blocks
In pulse skipping control the duty cycle must be chosen by the user depending on supply
voltage and output regulated voltage. Therefore the switching regulator has 4 possible duty
cycles that can be changed by writing the VmainSwSelPWM bits in the MainSwCfg register
according to following Table 10.
The output current is limited to a value that can be set by means of SelIlimit bit in the
MainSwCfg register according to following Table 11.
Table 10.
Main switching regulator PWM specification
MainSwCfg register
Duty cycle value
Comments
VmainSwSelPWM[1:0]
Typical
00
12%
01
15%
10
26%
Default state
11
63.5%
Table 11.
Main switching regulator current limit
SelIlimit
Current limit (min)
Comments
0
3.3A
Default state
12.3A
La
VSupply
C
High Side
Driver
Control
Logic
Current Sense
Charge pump Voltage
VSWmain_FB
Voltage
Loop Control
Regulator Ref
-
+
Under voltage
Threshold
Filter
Ra
Rb
From Central Logic
Regulator Freq
-
+
To Central Logic
Under voltage flag
VSWmain_SW
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