L6230PD STMicroelectronics, L6230PD Datasheet - Page 11

• Manufacturer Part Number: L6230PD
• Description: Motor / Motion / Ignition Controllers & Drivers DMOS Driver 3-Phase Brushless DC Motor
• Manufacturer: STMicroelectronics
• Type: DMOS Driverr

Specifications of L6230PD

• Product: Fan / Motor Controllers / Drivers
• Operating Supply Voltage: 8 V to 52 V
• Supply Current: 1.4 A
• Mounting Style: SMD/SMT
• Package / Case: PowerSO-36
• Operating Temperature: - 40 C to + 125 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L6230
5
5.1
Circuit description
Power stages and charge pump
The L6230 integrates a three-phase bridge, which consists of 6 power MOSFETs connected
as shown on the block diagram (see
R
conduction protection is implemented by using a dead time (t
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
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 6.
DS(ON)
A
= 0.73 Ω (typical value @ 25 °C) with intrinsic fast freewheeling diode. Cross
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
6. The oscillator output (pin VCP) is a square wave at 600 kHz (typically)
P
VCP
Doc ID 18094 Rev 1
D1
C
P
D2
VBOOT
Figure
C
BOOT
1), each power MOS has an
VS
A
VS
B
DT
1N4148
1N4148
220 nF
Value
10 nF
= 1 µs typical value) set by
V
S
BOOT
Circuit description
S
).
) is obtained
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