L6227DTR STMicroelectronics, L6227DTR Datasheet - Page 12

• Manufacturer Part Number: L6227DTR
• Description: IC DRVR DUAL FULL-BRG PWM 24SOIC
• Manufacturer: STMicroelectronics
• Type: H Bridger
• Series: -r

Specifications of L6227DTR

• Input Type: Non-Inverting
• Number Of Outputs: 4
• On-state Resistance: 730 mOhm
• Current - Output / Channel: 1.4A
• Current - Peak Output: 2.8A
• Voltage - Supply: 8 V ~ 52 V
• Operating Temperature: -25°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (7.5mm Width)
• Operating Supply Voltage: 8 V to 52 V
• Supply Current: 1.4 A
• Mounting Style: SMD/SMT
• For Use With: 497-6817 - EVAL BOARD FOR L6227Q
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3363-2

L6227
Figure 10. Area where t
can vary maintaining the PWM regulation.
ON
100
10
1.5 s (typ. value)
1
0.1
1
10
100
Coff [nF]
SLOW DECAY MODE
Figure 11 shows the operation of the bridge in the Slow Decay mode. At the start of the off time, the lower power
MOS is switched off and the current recirculates around the upper half of the bridge. Since the voltage across
the coil is low, the current decays slowly. After the dead time the upper power MOS is operated in the synchro-
nous rectification mode. When the monostable times out, the lower power MOS is turned on again after some
delay set by the dead time to prevent cross conduction.
Figure 11. Slow Decay Mode Output Stage Configurations
A) ON TIME
B) 1 s DEAD TIME
C) SYNCHRONOUS
D) 1 s DEAD TIME
RECTIFICATION
D01IN1336
12/22