TDA5341 Datasheet, PDF (15/28 Pages) NXP Semiconductors – Brushless DC motor and VCM drive circuit with speed control

Philips Semiconductors
Brushless DC motor and VCM drive circuit
with speed control
Product specification
TDA5341
Table 3 Division factor
D19
D18
POLE PAIRS
0
0
4
0
1
6
1
0
8
1
1
12
• D17 to D0
These bits program the division factor to apply to the
ROSC signal so as to generate a reference that will
precisely control the spindle rotation;
– The division factor can range from 8 (DIV = 1) to
8 × [2¹⁸ − 1] = 2097144 (DIV = 3FFFF)
– The relationship between this division factor, ROSC
and the motor frequency is as follows:
DIVISION FACTOR = 7.5 × ROSC/MOTOR speed
where the MOTOR speed is given in rpm and ROSC
in Hz.
Example: for a motor speed of 3600 rpm and a reference
oscillation ROSC of 16 MHz, the division factor that has to
be programmed via the bus, will be:
DIV = 7.5 × -1---6--3---^×-6---0-1--0-0---^–---⁶- = 33333
The resulting error will be less than 0.04 rpm.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
V_DD
V_i
V_60,8,21
V_45,37,53
V_1,2,18,19
T_stg
T_amb
P_tot
positive supply voltage
input voltage (all pins)
output voltage pins MOT1, MOT2 and MOT3
output voltage pins VCM−, VCM+ and SENSEOUT
input voltage pins CAPST, CAPTI, CAPCDM and CAPCDS
IC storage temperature
operating ambient temperature
total power dissipation
MIN.
−
−0.3
−0.25
0.7
−
−55
0
MAX.
UNIT
5.5
V
V_DD + 0.3 V
+5.5
V
V_DD + 0.7 V
2.5
V
+150
°C
+70
°C
see Fig.7
HANDLING
Every pin withstands the ESD test in accordance with MIL-STD-883C. Method 3015 (HBM 1900 Ω, 100 pF) 3 pulses
positive and 3 pulses negative on each pin with reference to ground. Class 1 : 0 to 1999 V.
THERMAL CHARACTERISTICS
SYMBOL
R_{th j-a}
PARAMETER
thermal resistance from junction to ambient in free air
VALUE
54
UNIT
K/W
1997 Jul 10
15