- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383940 > TDA5345HT (NXP SEMICONDUCTORS) 5 V spindle & VCM driver combo PDF資料下載
參數(shù)資料
| 型號(hào)： | TDA5345HT |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 運(yùn)動(dòng)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)： | 24/44頁 |
| 文件大?。?/td> | 213K |
| 代理商： | TDA5345HT |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁當(dāng)前第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁
1999 June 10
24
Philips Semiconductors
Preliminary specification
5 V spindle & VCM driver combo
TDA5345HT
Table 12
VcmMinus voltage during the slow retract step versus Vretract[2:0] programming (bits [2:0] in register #2):
In full power mode, VcmMinus voltage is limited to 2.8 V. When the spindle back-EMF is used as a supply (power down)
the voltage will not be so high. The loop is working in saturation mode and the retract PMOS is fully saturated.
It is possible to have a kind of “soft rising” slope on VcmMinus voltage when switching from the slow retract state
(VcmMinus voltage is small) to the full power state (VcmMinus voltage is high). An internal digital counter generates
some steps (250 mV high) from V
VcmMinus
(SlowRetract) to V
VcmMinus
(FullPower) when VcmRetSoftRis = ‘1’ (bit 3, reg #2).
During all the VCM ramp unload sequence, a programmable state machine is activated, clocked by the spindle
back-EMF on SpinMotA.
If T
bEMF
is the spindle back-EMF period, the steps duration will vary according to the following table:
Table 13
Brake duration versus the T_VcmBrake[2:0] programming (bits [2:0] in register #3):
Table 14
Slow retract duration versus the T_SlowRet[5:0] programming (bits [8:3] in register #3):
Table 15
Full Power retract duration versus the T_FullPower[2:0] programming (bits [11:9] in register #3):
* Include typical waveform
VRETRACT[2:0]
VCMMINUS VOLTAGE
111
...
001
000
1 V
...
250 mV
125 mV
T_VCMBRAKE[2:0]
BRAKE DURATION
111
...
010
001
000
7*(2*T
bEMF
) +T
bEMF
...
2*(2*T
bEMF
) +T
bEMF
1*(2*T
bEMF
) +T
bEMF
0
T_SLOWRET[5:0]
SLOW RET. DURATION
111111
...
000010
000001
000000
63*T
bEMF
+T
bEMF
...
2*T
bEMF
+T
bEMF
1*T
bEMF
+T
bEMF
0
T_FULLPOW[2:0]
FULL POWER DURATION
111
...
010
001
000
7*(32*T
bEMF
) +T
bEMF
...
2*(32*T
bEMF
) +T
bEMF
1*(32*T
bEMF
) +T
bEMF
0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TDA5360 | Pre-Amplifier for Hard Disk Drive with MR-Read / Inductive Write Heads |
| TDA5360UH | Pre-Amplifier for Hard Disk Drive with MR-Read / Inductive Write Heads |
| TDA5360UK | Pre-Amplifier for Hard Disk Drive with MR-Read / Inductive Write Heads |
| TDA5630 | 9 V VHF, hyperband and UHF mixer/oscillator for TV and VCR 3-band tuners |
| TDA5630BT | 9 V VHF and UHF mixer/oscillator for TV and VCR cable tuners |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA5360 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Pre-Amplifier for Hard Disk Drive with MR-Read / Inductive Write Heads |
| TDA5360UH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Pre-Amplifier for Hard Disk Drive with MR-Read / Inductive Write Heads |
| TDA5360UK | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Pre-Amplifier for Hard Disk Drive with MR-Read / Inductive Write Heads |
| TDA5510-2 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Video IF IC with VTR Connection |
| TDA5630 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:9 V VHF, hyperband and UHF mixer/oscillator for TV and VCR 3-band tuners |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。