TDA5345HT Datasheet, PDF (36/44 Pages) NXP Semiconductors – 5 V spindle & VCM driver combo

Philips Semiconductors
5 V spindle & VCM driver combo
Preliminary specification
TDA5345HT
SYMBOL
t_HD
t_FINISH
t_WAIT
PARAMETER
clock to data hold time
last active clock to chip
select inactive on write
time between successive
serial port accesses
CONDITIONS
GbD
GbD
GbD
MIN.
TYP.
2
5
MAX. UNIT.
ns
T_SCLK/2
ns
CLOCK
cycles
3. Spindle circuits
3-1 Spindle driver: (assuming that Resistor @ pin RefCurRes is exactly 33 kΩ)
SYMBOL
R_DSon
I_StartMax
I_StartStep
I_StartRes
I_RUN
SR₁
SR₂
SR₃
SR₄
ACC_{R_FB}
V_fbmax
V_fbmin
I_BP
PARAMETER
total FET resistance
maximum start-up current
start-up current step
start-up current resolution
running current
fly-backs slew rate control
fly-backs slew rate control
fly-backs slew rate control
fly-backs slew rate control
relative accuracy on the 6
fly-backs slew-rate
max voltage on spinmotx
min voltage on spinmotx
brake power leakage
CONDITIONS
I_SPIN = 620 mA
DAC6[5,0] = “011111”
continuous
FlyBackSlope[0,1] = “00”
FlyBackSlope[0,1] = “01”
FlyBackSlope[0,1] = “10”
FlyBackSlope[01] = “11”
positive fly-back, I
<100 mA
neg. fly-back, I <100 mA
PorN = “0”, GbD
MIN.
5
19
48
105
222
-20
Vdd5+
0.05
-0.35 V
TYP.
620
20
5
26.5
59
124
256
Vdd5+
0.2
-0.2 V
5
MAX.
1.5
300
34
70
143
290
+20
Vdd5+
0.35
-0.05 V
250
UNIT.
Ω
mA
mA
bits
mA
mV/µs
mV/µs
mV/µs
mV/µs
%
V
V
nA
3-2 Spindle current loop (assuming that Resistor @ pin RefCurRes is exactly 33 kΩ)
SYMBOL
ACC_StCur
ACCR_StCur
gm_OTA
PARAMETER
spindle start-up current
accuracy
current relative accuracy
between each phase
OTA transconductance
CONDITIONS
I_StUp > 400 mA
I_StUp > 400 mA
GbD
MIN.
-6
TYP.
-5
35
50
MAX.
+6
+5
65
UNIT
%
%
µA/V
3-3 Spindle Fll Charge Pump (assuming that Resistor @ pin RefCurRes is exactly 33 kΩ)
SYMBOL
I_ch/disch
SYM_Cur
t_r/f
PARAMETER
charge/discharge current
charge/discharge currents
symetry
rise/Fall time
CONDITIONS
GbD
MIN.
465
0.98
TYP.
500
1
MAX.
535
1.02
2
UNIT
µA
ns
1999 June 10
36