SGS Thomson Microelectronics L6232E Datasheet
1.5A MAXIMUMPEAKCURRENT
CONTROLLEDSLEWRATE
CENTRAL CHARGE PUMP
PWMAND LINEARMODES
CUTOFFTIME USER CONFIGURABLE
FAST,FREE-WHEELINGDIODESON CHIP
OVER-TEMPERATUREPROTECTION
BRAKEFUNCTIONINPUT
SPINDLE DRIVER
PLCC21+7
ORDERING NUMBER:
L6232E
L6232E
DESCRIPTION
The L6232E is a triple half bridge driver intended
for use in brushless DC motor applications. This
part can be used to form the power stage of a
three-phase, brushless DC motor control loop,
and is especiallyuseful for disk drive applications.
Power drivers are Integrated DMOS transistors
and featurefast recirculatingdiodes as an integral
BLOCK DIAGRAM
part of their structure. The logic inputs are TTLlevel compatible, with internal pull-up, allowing interfacing to open collector outputs. All necessary
circuitry to perform PWM and linear motor speed
control is included. A central charge pump is utilized to drive the upper DMOS transistors, and
also to power the braking function.The L6232E is
packagedin PLCC28.
October 1996
This is advanced information on a new product now in development or undergoing evaluation. Details are subjectto changewithout notice.
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L6232E
PIN DESCRIPTION
Pin Name Function
1 to 4 GND Common Ground. Also provides heat-sink to PCB.
5, 9 SENSE Output for current sense resistors.
6 INLB Logic Input to turn on the lower driver(Active High).
7, 11 V
S
8 INLA Logic input to turn on the lowey driver (Active High).
10 C
12 C
S
P
13 RC Cutoff Time RC Network in PWM mode. The Resistor value is also used to define
14 INLC Logic input to turn on the lower driver (Active High).
15 BRK DLY External RC network for the brake delay.
16 INUC Logic Input to turn on the upper driver (Active Low).
17 PWM Vref Input for Reference Controlin PWM mode
18 LIN Vref Input for Reference Controlvoltage inLIN mode
19 COMP External compensation for error amplifier
20 OUTA DMOS Half-bridgeA Out.
21 BRK Active LOW logic input thattriggers the delayed brake.
22 OUTB DMOS Half-bridgeB Out.
23 INUA Logic Input to turn on the upper drivers (Active Low).
24 INUB Logic Input to turn on the upper drivers (Active Low).
25 OUTC DMOS Half-bridgeC Out.
26 to 28 GND Common Ground. Also provides heat-sink to PCB.
Supply Voltage.
External Charge Pump Capacitor.
External Main Charge Pump capacitor.
the slew-rate in linearmode (LIN).
PIN CONNECTION
(Topview)
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ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
DS sus
V
V
Opeak
V
V
V
P
T
stg,Tj
Cp
V
REF
I
p
I
O
tot
Peak Output Sustaining Voltage 15 V
Supply Voltage 15 V
S
Output Peak Voltage (tpK =5µsec; 10% d.c.) 18 V
Charge Pump Input Voltage 30 V
Logic Input Voltage -0.3 to 7 V
i
PWM VREF--LIN VREF Input Voltage -0.3 to 7 V
Sense Input Voltage -1 to 7 V
is
Sink-Source Peak Output Current (*) 3.5 A
Sink-Source DC Output Current 1.8 A
Total Power Dissipation (T
=70°C) 1.5 W
amb
Storage and Junction Temperature -40 to 150
THERMAL DATA
Symbol Description Value Unit
R
th j-pin
R
th j-amb
Notes
(*) Pulse width (limited only by junction temperature and by the transient thermal resistance.
(**) Mounted on board with 16cm
Thermal Resistance Junction-pins
Thermal Resistance Junction-ambient (**)
2
35µm thickness copperarea on board heatsink.
Max.
Max.
14
52
L6232E
C
°
°C/W
C/W
°
ELECTRICALCHARACTERISTICS
=25°C, unless otherwise specified)
T
j
(See the block diagram, V
=12V,R = 100KΩ; C = 180pF;
S
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
S
I
S
Supply Voltage 10.5 12 13.5 V
Quiescent Supply Current BRK = L; INUA = INUB = INUC
0.3 0.5 mA
= L; INLA = INLB = INLC = H;
Table 1
BRK = H; INUA = INUB = INUC
46mA
= H; INLA = INLB = INLC = L;
Table 1
I
OL
R
DSon
R
DSon
V
F
Output Leakage Current VO=VS= 13.5V 1 mA
Sink Out ON Resistance Tj=25°C (see Fig.4) 0.42 0.47 Ω
= 125°C 0.7
T
j
Source Out ON Resistance Tj=25°C (see Fig.4) 0.42 0.47
= 125°C 0.7 Ω
T
j
Body Diode Forward Drop (sink
IDS= 1A (seeFig. 6) 1 1.5 V
and source)
t
d(BRK)
T
BRK
I
B(LIN)
I
B(PWM)
LIN V
PWM V
G
v
Brake Delay Time See Fig. 1, 3; note1 210 ms
Braking Time 10 s
LIN Vref Input Bias Current LIN V
PWM Vref Input Bias Current PWM V
Reference Voltage Input Note 2; RS= 0.5Ω
ref
I
ref
I
Sense Amplifier Voltage Gain PWM V
LIN V
R
= 0.4 to 5.5V 400 950 nA
ref
= 0.4 to 5.5V 400 950 nA
ref
(PWM) = 1A
motor
(LIN) = 200mA
motor
= 2.5V,
ref
= 0.4V,
ref
= 0.5Ω; Note 2
S
3.7 4 4.3 V/V
2V
0.4 V
Ω
Ω
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