L6229QTR STMicroelectronics, L6229QTR Datasheet - Page 11

• Manufacturer Part Number: L6229QTR
• Description: IC DRIVER DMOS DC MOTOR 32VFQFPN
• Manufacturer: STMicroelectronics
• Type: 3 Phase Brushless DC Motor Driverr

Specifications of L6229QTR

• 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: 32-VFQFN, 32-VFQFPN
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-8495-2

L6229Q
5
5.1
Circuit description
Power stages and charge pump
The L6229Q integrates a three-phase bridge, which consists of 6 power MOSFETs
connected as shown on the block diagram (see
R
patterns are generated by the PWM current controller and the hall effect sensor decoding
logic (see relative paragraph 3.3 and 3.5). Cross conduction protection is implemented by
using a dead time (t
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
through an internal oscillator and few external components to realize a charge pump circuit
as shown in
with 10 V amplitude. Recommended values/part numbers for the charge pump circuit are
shown in
Table 7.
Figure 5.
DS(ON)
A
= 0.73 Ω (typical value @ 25 °C) with intrinsic fast freewheeling diode. Switching
Table
and VS
Figure
Charge pump external component values
Charge pump circuit
Component
7.
C
B
BOOT
C
D1
D2
must be connected together to the supply voltage (V
5. The oscillator output (pin VCP) is a square wave at 600 kHz (typically)
P
DT
= 1 µs typical value) set by internal timing circuit between the turn off
VCP
Doc ID 15209 Rev 3
D1
C
P
D2
VBOO T
C
BOO T
VS
Figure
A
VS
B
1). each power MOS has an
D01IN1328
1N4148
1N4148
220 nF
Value
10 nF
V
S
BOOT
Circuit description
S
).
) is obtained
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