L6227PDTR STMicroelectronics, L6227PDTR Datasheet - Page 11

• Manufacturer Part Number: L6227PDTR
• Description: IC DRVR FULL BRDG DUAL 36PWRSOIC
• Manufacturer: STMicroelectronics
• Type: H Bridger

Specifications of L6227PDTR

• 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: 36-PowerSOIC
• 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: Lead free / RoHS Compliant
• Other names: 497-4006-2

be bigger than t
can not be smaller than the minimum on time t
Figure 10 shows the lower limit for the on time t
be said that t
than t
So, small C
switching frequency), but, the smaller is the value for C
performance.
Figure 9. t
RCRISE
t



RCRISE
t
t
O N
O N
OFF
OFF
>
>
ON
- t
t
t
= 600 · C
O N MIN
RCRISE
DT
RCRISE
versus C
is always bigger than t
value gives more flexibility for the applications (allows smaller on time and, therefore, higher
. In this last case the device continues to work but the off time t
for allowing a good current regulation by the PWM stage. Furthermore, the on time t
OFF
–
=
t
OFF
DT
1 . 10
1 . 10
2.5 s (typ. value)
100
10
1
4
3
and R
0.1
OFF
ON(MIN)
R
off
because the device imposes this condition, but it can be smaller
ON(MIN)
ON
= 20k
1
for having a good PWM current regulation capacity. It has to
R
off
.
Coff [nF]
OFF
= 47k
, the more influential will be the noises on the circuit
R
off
= 100k
10
OFF
100
is not more constant.
L6227
11/22
ON