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): 116/139頁
文件大小: 3837K
代理商: L6460TR
Power bridges
L6460
78/139
Doc ID 17713 Rev 1
Figure 23.
Simple buck regulator
When this control loop is intended to be used as a simple buck regulator, the proper
Aux3BatteryCharge bit must be written in the Aux3SwCfg1 register.
The regulator will also implement a soft start strategy.
When L6460 “l(fā)ow power mode” is enabled this regulator will be disabled.
Here after are summarized the primary features of the regulator:
Internal power switch.
Nonlinear pulse skipping control.
Internally generated PWM (250 KHz switching frequency).
Cycle by cycle current limiting using internal current sensor/ external current
sense differential amplifier.
Protected against load short circuit.
Soft start circuitry to limit inrush current flow from primary supply.
Under voltage signal (both continuous and latched) accessible through SPI.
Over temperature protection.
In pulse skipping control PWM the duty cycle must be decided by the user depending on
supply voltage and regulated voltage.
Therefore the switching regulator has 4 possible PWM duty cycles that can be changed
writing in the Aux3PWMTable[1:0] bits in the Aux3SwCfg1 register according to the
IREF_FB
VREF_FB
COMP_I
COMP_V
PULSE SKIPPING
BURST
CONTROL LOGIC
PEAK CURRENT
MODE CONTROL
LOGIC
BRIDGE 4
PARALLELED
POWER
STAGE
SelFBRef<1:0>
DC4_plus
DC4_minus
SelCurrRef<1:0>
TO
LOAD
FBRef
CurrRef
Ilimit
PWM
L6460
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