SA56202 Datasheet, PDF (13/24 Pages) NXP Semiconductors – One-chip motor driver

Philips Semiconductors
SA56202
One-chip motor driver
7.12 Oscillator
The RC oscillator uses two external components (R_REF and C_OSC) to fix its frequency at
18 MHz. R_REF is used to generate a reference current. This reference current is used to
charge and discharge C_OSC. The nominal oscillation frequency f_osc is 18 MHz with
R_REF = 47 kΩ (2 % tolerance) and C_OSC = 70 pF (5 % tolerance). These values are fixed.
The oscillator can be overruled by applying an 18 MHz clock to pin COSC. The reference
current derived from R_REF is also used for R_LIM and R_EMF. R_REF should always be
connected.
7.13 Muting functions
Pins CTL1 and CTL2 are used to mute certain parts of the IC. See Table 3. In this table off
means 3-state.
Table 3:
CTL1
L
L
H
H
Muting functions
CTL2
Loading
motor
L
off
H
on
L
off
H
off
Sled motor Others
off
off
on
off
on
on
on
on
Spindle mode
off
FG and Hall bias on
block commutation
True-Silent commutation
8. Limiting values
Table 4: Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
Conditions
Min
Voltages
V_DD(SPN)
V_DD(SLD)
V_DD(LD)
V_DD(ACT)
spindle driver supply voltage
sled driver supply voltage
loading driver supply voltage
actuator drivers supply
voltage
−0.5
−0.5
−0.5
−0.5
V_DDA
Currents
system supply voltage
−0.5
I_DD(SPN)
current on pins 12, 14 and 16
-
I_DD(SLD)
current on pins 33, 34, 35, 36,
-
37 and 38
I_DD(ACT)
current on pins 39, 40, 41, 42,
-
45, 46, 47 and 48
I_HALL
current on pins 1, 2, 3, 4, 5
−1
and 6
I_HBIAS
current on pin 7
−1
I_RPROG
current on pins 8, 9 and 10
−1
I_OD
current on pins 18 and 28
−1
I_DIG
current on pins 26 and 27
−1
I_CPUMP
current on pins 23, 24 and 25
−20
Max
+16
+16
+16
+16
+6.5
2.1
1.2
2.0
+1
+100
+1
+10
+1
+20
Unit
V
V
V
V
V
A
A
A
mA
mA
mA
mA
mA
mA
9397 750 12772
Preliminary data sheet
Rev. 01 — 19 July 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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