Datasheet

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L6234

THREE PHASE MOTOR DRIVER

SUPPLY VOLTAGE FROM 7 TO 52V

5A PEAK CURRENT

DS ON

0.3

Ω

TYP. VALUE AT 25

CROSS CONDUCTION PROTECTION

TTL COMPATIBLE DRIVER

OPERATING FREQUENCY TO 50KHz

THERMAL SHUTDOWN

INTRINSIC FAST FREE WHEELING DIODES

INPUT AND ENABLE FUNCTION FOR

EVERY HALF BRIDGE

10V EXTERNAL REFERENCE AVAILABLE

DESCRIPTION

The L6234 is a triple half bridge to drive a

brushless motor.

It is realized in Multipower BCD technology which

combines isolated DMOS power transistors with

CMOS and Bipolar circuits on the same chip.

By using mixed technology it has been possible to

optimize the logic circuitry and the power stage to

achieve the best possible performance.

The output DMOS transistors can sustain a very

high current due to the fact that the DMOS struc-

ture is not affected by the second breakdown ef-

fect, the RMS maximum current is practically lim-

ited by the dissipation capability of the package.

All the logic inputs are TTL, CMOS and

P com-

patible. Each channel is controlled by two sepa-

rate logic input.

L6234 is available in 20 pin POWER DIP package

(16+2+2) and in PowerSO20.

August 2003

PIN CONNECTION (Top view)

ORDERING NUMBERS:

L6234 (POWER DIP 16+2+2)

L6234PD (PowerSO20)

PowerSO20

POWER DIP (16+2+2)

OUT1

IN1

EN1

GND

EN3

IN3

9 VCP

VBOOT

SENSE2

GND

SENSE1

EN2

IN2

OUT220

D98IN848

OUT3 10 VREF11

POWER DIP (16+2+2)

GND

SENSE1

EN2

IN2

OUT2

IN1

OUT1

EN1

EN3

IN3

REF

OUT3

BOOT

SENSE2

GND1

GND GND

D94IN129A

PowerSO20

1/10

Summary of content (10 pages)

PAGE 1
L6234 ® THREE PHASE MOTOR DRIVER SUPPLY VOLTAGE FROM 7 TO 52V 5A PEAK CURRENT RDS ON 0.3Ω TYP. VALUE AT 25°C CROSS CONDUCTION PROTECTION TTL COMPATIBLE DRIVER OPERATING FREQUENCY TO 50KHz THERMAL SHUTDOWN INTRINSIC FAST FREE WHEELING DIODES INPUT AND ENABLE FUNCTION FOR EVERY HALF BRIDGE 10V EXTERNAL REFERENCE AVAILABLE DESCRIPTION The L6234 is a triple half bridge to drive a brushless motor.
PAGE 2
L6234 BLOCK DIAGRAM 0.22µF 10nF VCP 1µF VREF VBOOT 1N4148 VREF= 10V CHARGE PUMP Vs 7 to 52V IN1 TH1 0.
PAGE 3
L6234 THERMAL DATA Symbol DIP16+2+2 PowerSO20 Unit Thermal Resistance, Junction to Pin 12 – °C/W Rth j-amb1 Thermal Resistance, Junction to Ambient (see Thermal Characteristics) 40 – °C/W Rth j-amb2 Thermal Resistance, Junction to Ambient (see Thermal Characteristics) 50 – °C/W Rth j-case Thermal Resistance Junction-case – 1.5 °C/W Rth j-pin Parameter THERMAL CHARACTERISTICS Rth j-pins DIP16+2+2.
PAGE 4
L6234 ABSOLUTE MAXIMUM RATINGS Symbol VS Power Supply Voltage Parameter Value 52 Unit V VIN,VEN Input Enable Voltage – 0.
PAGE 5
L6234 ELECTRICAL CHARACTERISTICS (Vs = 42V ; Tj = 25°C unless otherwise specified) Symbol Parameter VS Supply Voltage Vref Reference Voltage IS Quiescent Supply Current TS Thermal Shutdown TD Dead Time Protection Test Condition Min. Typ. 7 Max. Unit 52 V 10 V 6.5 mA 150 °C 300 ns OUTPUT DMOS TRANSISTOR Symbol IDSS RDS (ON) Parameter Test Condition Min. Typ. Leakage Current ON Resistance Max. Unit 1 mA Ω 0.
PAGE 6
L6234 Figure 1. Quiescent Current vs. Supply Voltage. Figure 2. Normalized Quiescent Current vs. switching frequency. Iq [m A ] Iq/(Iq@500Hz) 10 1.75 9 Tj = 130°C T j = -4 0 °C Tj = 25°C 8 1.5 T j = 25 °C 7 6 Tj = -40°C T j = 1 00 °C 1.25 5 T j = 1 30 °C 4 3 1 2 1 0 0 8 16 24 V s [V ] 32 40 0.75 48 Figure 3. Typical RDS (ON) vs. Supply Voltage. R D S (O N ) [ Ω ] 0 .7 0 10 20 30 fsw [kHz] 40 50 60 Figure 4. Source Drain Forward ON voltage vs. Junction Temperature.
PAGE 7
L6234 Figure 7. Reference Voltage vs. Junction Temperature. Figure 8. PowerSO-20 Transient Thermal Resistance V re f [V ] 11 V s = 5 2V 10 V s = 2 4V 9 8 V s = 1 0V 7 6 Vs = 7V 5 4 3 2 1 0 -50 -25 0 25 50 T j [°C ] 75 1 00 1 25 1 50 Figure 9. PowerSO-20 Thermal Resistance (Mounted on Aluminium substrate) Figure 10. PowerSO-20 Thermal Resistance (Mounted on FR4 monolayer substrate) Figure 11. PowerSO-20: with external heatsink Figure 12.
PAGE 8
L6234 DIM. mm MIN. TYP. A a1 inch MAX. MIN. TYP. 3.6 0.1 0.142 0.3 a2 0.004 0.012 3.3 0.130 a3 0 0.1 0.000 0.004 b 0.4 0.53 0.016 0.021 c 0.23 0.32 0.009 0.013 D (1) 15.8 16 0.622 0.630 0.386 D1 9.4 9.8 0.370 E 13.9 14.5 0.547 e 1.27 e3 E1 (1) 0.570 0.450 11.1 E2 0.429 0.437 2.9 0.114 E3 5.8 6.2 0.228 0.244 G 0 0.1 0.000 0.004 H 15.5 15.9 0.610 h L 0.626 1.1 0.8 JEDEC MO-166 0.043 1.1 N Weight: 1.9gr 0.050 11.43 10.
PAGE 9
L6234 mm DIM. MIN. a1 0.51 B 0.85 b b1 TYP. inch MAX. MIN. TYP. MAX. 0.020 1.40 0.033 0.50 0.38 0.055 0.020 0.50 D 0.015 0.020 24.80 0.976 E 8.80 0.346 e 2.54 0.100 e3 22.86 0.900 F 7.10 0.280 I 5.10 0.201 L OUTLINE AND MECHANICAL DATA 3.30 0.130 Powerdip 20 Z 1.27 0.
PAGE 10
L6234 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice.