參數(shù)資料
型號: TDA5345HT
廠商: NXP SEMICONDUCTORS
元件分類: 運(yùn)動控制電子
英文描述: 5 V spindle & VCM driver combo
中文描述: DISK DRIVE MOTOR CONTROLLER, 2 A, PQFP64
封裝: LOW PROFILE, PLASTIC, TQFP-64
文件頁數(shù): 25/44頁
文件大小: 213K
代理商: TDA5345HT
1999 June 10
25
Philips Semiconductors
Preliminary specification
5 V spindle & VCM driver combo
TDA5345HT
Spindle brake after retract sequence :
In case of power down, an emergency procedure is initiated by the PorN signal : the spindle back-EMF is synchronously
rectified to supply the VCM ramp unload function. At the end of the full power step, a spindle short-circuit brake is
activated (SpinMotA, SpinMotB & SpinMotC are together short-circuited to ground). It is supplied by an external reservoir
capacitor connected to pin BrakePower (60).
Shock sensor amplifier:
A complete circuitry is included on-chip to control an external shock sensor.
Figure 14 shows a typical application diagram:
Fig.17 The states for the VCM retract
VCM+
VCM-
BRAKE
SOFT RETRACT
FULL POWER
BRAKE DELAY
SOFT RISING
FCK135
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