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UCC2626 Datasheet Preview

UCC2626 Datasheet

Brushless DC Motor Controller

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UCC2626, UCC3626
SLUS318B – APRIL 1999 – REVISED JANUARY 2002
BRUSHLESS DC
MOTOR CONTROLLER
FEATURES
D Two-Quadrant and Four-Quadrant Operation
D Integrated Absolute Value Current Amplifier
D Pulse-by-Pulse and Average Current Sensing
D Accurate, Variable Duty-Cycle Tachometer
Output
D Trimmed Precision Reference
D Precision Oscillator
D Direction Output
DESCRIPTION
The UCC3626 motor controller device combines
many of the functions required to design a
high-performance, two- or four-quadrant, three-
phase, brushless dc motor controller into one
package. Rotor position inputs are decoded to
provide six outputs that control an external power
stage. A precision triangle oscillator and latched
comparator provide PWM motor control in either
voltage- or current-mode configurations. The
oscillator is easily synchronized to an external
master clock source via the SYNCH input.
Additionally, a QUAD select input configures the
chip to modulate either the low-side switches only,
or both upper and lower switches, allowing the
user to minimize switching losses in less
demanding two-quadrant applications.
The device includes a differential current-sense
amplifier and absolute-value circuit which provide
an accurate reconstruction of motor current,
useful for pulse-by-pulse overcurrent protection,
as well as closing a current control loop. A
precision tachometer is also provided for
implementing closed-loop speed control. The
TACH_OUT signal is a variable duty-cycle,
frequency output, which can be used directly for
digital control or filtered to provide an analog
feedback signal. Other features include COAST,
BRAKE, and DIR_IN commands, along with a
direction output, DIR_OUT.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
Copyright 2002, Texas Instruments Incorporated
1




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UCC2626 Datasheet Preview

UCC2626 Datasheet

Brushless DC Motor Controller

No Preview Available !

UCC2626, UCC3626
SLUS318B APRIL 1999 REVISED JANUARY 2002
AVAILABLE OPTIONS
PACKAGED DEVICES
TA
PDIP
SOIC{
TSSOP{
(N)
(DW)
(PW)
40_C to 85_C
UCC2626N
UCC2626DW
UCC2626PW
0_C to 70_C
UCC3626N
UCC3626DW
UCC3626PW
{The DW and PW packages are available taped and reeled. Add TR suffix to device
type (e.g. UCC2626DWTR) to order quantities of 2,000 devices per reel.
N PACKAGE
(TOP VIEW)
DW and PW PACKAGES
(TOP VIEW)
GND
VREF
TACH_OUT
R_TACH
C_TACH
CT
SYNCH
DIR_OUT
SNS_NI
SNS_I
IOUT
OC_REF
PWM_I
PWM_NI
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 VDD
27 AHI
26 ALOW
25 BHI
24 BLOW
23 CHI
22 CLOW
21 DIR_IN
20 QUAD
19 BRAKE
18 COAST
17 HALLC
16 HALLB
15 HALLA
GND
VREF
TACH_OUT
R_TACH
C_TACH
CT
SYNCH
DIR_OUT
SNS_NI
SNS_I
IOUT
OC_REF
PWM_I
PWM_NI
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VDD
AHI
ALOW
BHI
BLOW
CHI
CLOW
DIR_IN
QUAD
BRAKE
COAST
HALLC
HALLB
HALLA
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
Supply voltage VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 V
Input voltage, BRAKE, COAST, DIR_IN, HALLA, HALLB, HALLC,
OC_REF, QUAD, SYNCH, PWM_I, PWM_NI . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to VDD
SNS_I, SNS_NI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to VDD
Output current AHI, ALOW, BHI, BLOW, CHI, CLOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±200 mA
DIR_OUT, IOUT, TACH_OUT, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 mA
VREF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 150°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Lead temperature soldering 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . 300°C
Stresses beyond those listed under absolute maximum ratingsmay cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditionsis not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
All voltages are with respect to GND. Currents are positive into negative out of the specified terminal.
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Part Number UCC2626
Description Brushless DC Motor Controller
Maker etcTI
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