The HA13536F is a 3-phase brushless DC motor driver IC with digital speed control. It is being developed
for direct drive of the spindle motor of 5 V floppy disk drives with a height of 3/4" or less. It has the following functions and features.
Functions
• 1.0 A per phase, 3-phase drive circuit (current driver)
• Digital speed control circuit
• FG Amp
• Index circuit
• Current limiter circuit
• Over-temperature shutdown circuit (OTSD)
Features
• Low saturation voltage, typically 1.15 V (at 0.7 A)
• Soft switching drive circuit
• No need for an output snubber circuit
Page 2
HA13536F
Pin Arrangement
CC
U phase – input
U phase + input
V
Hall bias
Bias – pin
Bias + pin
V phase + input
V phase – input
W phase + input
W phase – input
AGC
Index + input
Index – input
FG + input
18
19
20
21
22
23
24
TAB
25
26
27
28
123
RPM SEL
FG – input
TAB
TAB
Index adjust
(Top view)
16 15
17
14
13
12
11
TAB
10
456
CE
Index Vreg
Index output
Bias output
U phase output
V phase output
Current detection
W phase output
9
Phase compensation
8
Charge pump output
7
CLK input
2
Page 3
Block Diagram
HA13536F
R102
60 ppr
R101
Ct
C104
FG
V
CC
Hu
Hv
Hw
Hi
Rt1
CE
CLK
1 MHz
C103
Rt2
19
20
21
22
23
24
26
27
17
16
15
28
3
4
6
7
1
1.6 V
C102C105
251418
u (+)
u (-)
Hall
v (+)
v (-)
w (+)
w (-)
(+)
(-)
Index
circuit
Bias
FG Amp.
Amp
+
–
OTSD
Speed
discrim-
inator
Matrix
Control Amp.
–
+
–
+
Buffer Amp.
Charge
pump
Output
Amp
Current
limitter
Vref2
U
V
W
Vref1
C101
13
12
10
11
Rnf
C106
9
Index output
5
(Open collector)
RPM select
2
H: 360 rpm
L: 300 rpm
8
C1
V
CC
5 V
C2
R2
Note : Pin arrangement is preliminary specification.
TAB
3
Page 4
HA13536F
O
Pin Function
Pin Number Pin NameFunctionPin Voltage
1FG (–) inputFG Amp. (–) input terminal
2RPMSELChange terminal for motor rotation speed
“L” → 300 rpm, “H” → 360 rpm
3Index adjustmentTerminal to set up burst time of index circuit0 V Min, 1.2 V Max
4Index VregOutput terminal for fixed voltage of index circuit1.5 V Typ
5Index outputIndex output terminal (Open collector)V
6CEChip enable terminal
“L”: enable, “H”: disable
7CLK inputCLK input terminalVTH = 1.4 V Typ
8C-PUMP outputSpeed error Integration and Phase compensation of
speed control
9Phase compensation To prevent the parastic oscillation of output, insert
the capacitor between pin 9 and pin 11.
10W phase outputW phase output
11Current detectionOutput current detection and terminal which is con-
Notes: 1. Determine the integration constants from the following formulas:
2πf
ω
O
R2 =
C1 =
FG
≤
20
Jω
K
ω
O
N
O
Gctl Icp
T
1
R2
O
1
9.55
1
10
.
Rnf
(rad/s)
(Ω)
(F)
C2 = 10C1
(F)
5
Page 6
HA13536F
In the above formulas:
ω
O
f
FG
N
O
J= Motor moment of inertia in kg•cm•s
KT= Motor torque constant in kg•cm/A
Rnf = Current detection in Ω
Gctl= Control amp gain (see Electrical Characteristics)
Icp = Charge pump output current (see Electrical Characteristics)
2. The current limiter operates according to the following formula:
I
OMAX =
where Vref1 is the current limiter reference voltage (see Electrical Characteristics)
3. The burst time t1 is defined as follows:
t1 ≈ – Ct × Rt1’ × ln (1 – Vth1 (L) / Vreg) (RPM select input low)
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
Hitachi bears no responsibility for problems that may arise with third party’s rights, including
intellectual property rights, in connection with use of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without
written approval from Hitachi.
7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor
products.
Hitachi, Ltd.
Semiconductor & Integrated Circuits.
Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan
Tel: Tokyo (03) 3270-2111 Fax: (03) 3270-5109
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For further information write to:
Hitachi Semiconductor
(America) Inc.
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San Jose,CA 95134
Tel: <1> (408) 433-1990
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Hitachi Asia Ltd.
Taipei Branch Office
3F, Hung Kuo Building. No.167,
Tun-Hwa North Road, Taipei (105)
Tel: <886> (2) 2718-3666
Fax: <886> (2) 2718-8180
Copyright ' Hitachi, Ltd., 1999. All rights reserved. Printed in Japan.
Hitachi Asia (Hong Kong) Ltd.
Group III (Electronic Components)
7/F., North Tower, World Finance Centre,
Harbour City, Canton Road, Tsim Sha Tsui,
Kowloon, Hong Kong
Tel: <852> (2) 735 9218
Fax: <852> (2) 730 0281
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