L6229PD STMicroelectronics, L6229PD Datasheet - Page 8

• Manufacturer Part Number: L6229PD
• Description: IC MOTOR DRIVER 3PH 36-POWERSO
• Manufacturer: STMicroelectronics
• Type: 3 Phase Brushless DC Motor Driverr

Specifications of L6229PD

• Applications: DC Motor Driver, Brushless (BLDC), 3 Phase
• Number Of Outputs: 1
• Current - Output: 2.8A
• Voltage - Supply: 12 V ~ 52 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 36-PowerSOIC
• Operating Supply Voltage: 8 V to 52 V
• Mounting Style: SMD/SMT
• For Use With: 497-5491 - EVAL BOARD FOR L6229PD SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-5841-5; L6229PD

L6229
3
3.1 POWER STAGES and CHARGE PUMP
The L6229 integrates a Three-Phase Bridge, which consists of 6 Power MOSFETs connected as shown on the
Block Diagram. Each Power MOS has an R
diode. Switching patterns are generated by the PWM Current Controller and the Hall Effect Sensor Decoding
Logic (see relative paragraphs). Cross conduction protection is implemented by using a dead time (t
typical value) set by internal timing circuit between the turn off and turn on of two Power MOSFETs in one leg
of a bridge.
Pins VS
Using N-Channel Power MOS for the upper transistors in the bridge requires a gate drive voltage above the
power supply voltage. The Bootstrapped Supply (V
ternal components to realize a charge pump circuit as shown in Figure 6. The oscillator output (pin VCP) is a
square wave at 600KHz (typically) with 10V amplitude. Recommended values/part numbers for the charge
pump circuit are shown in Table 7.
Table 7. Charge Pump External Component Values.
Figure 6. Charge Pump Circuit
3.2 LOGIC INPUTS
Pins FWD/REV, BRAKE, EN, H
ture is shown in Figure 4. Typical value for turn-ON and turn-OFF thresholds are respectively V
V
Pin EN (enable) may be used to implement Overcurrent and Thermal protection by connecting it to the open collector
DIAG output If the protection and an external disable function are both desired, the appropriate connection must be
implemented. When the external signal is from an open collector output, the circuit in Figure 8 can be used . For ex-
ternal circuits that are push pull outputs the circuit in Figure 9 could be used. The resistor R
the range from 2.2KΩ to 180KΩ. Recommended values for R
information for selecting the values can be found in the Overcurrent Protection section.
8/25
th(OFF)
C
C
R
D
D
BOOT
P
P
1
2
CIRCUIT DESCRIPTION
A
= 1.3V.
and VS
B
MUST be connected together to the supply voltage (V
1
, H
VCP
2
and H
D1
R
C
P
P
D2
DS(ON)
3
VBOOT
are TTL/CMOS and µC compatible logic inputs. The internal struc-
= 0.73Ω (typical value @25°C) with intrinsic fast freewheeling
C
BOOT
BOOT
220nF
10nF
100Ω
1N4148
1N4148
) is obtained through an internal oscillator and few ex-
VS
A
EN
VS
and C
B
EN
D01IN1328
are respectively 100KΩ and 5.6nF. More
S
).
V
S
EN
should be chosen in
th(ON)
= 1.8V and
DT
= 1µs