TB62208FNG
2011-01-28
10
AC Electrical Characteristics
(Ta = 25°C, V
M
= 24 V, 6.8 mH/5.7
Ω
)
Characteristics Symbol
Tes t
Circuit
Test Condition Min Typ. Max Unit
Phase frequency f
PHASE
AC OSCM = 1600 kHz – – 400 kHz
t
PHASE
AC 100 – – ns
t
wp
AC 50 – – ns
Minimum phase pulse width
t
wn
AC
⎯
50 – – ns
t
r
⎯ 150 200 250 ns
t
f
⎯
⎯
100 150 200 ns
t
pLH(P)MAX
⎯ 500 850 1200 ns
t
pHL(P)MAX
⎯ 500 850 1200 ns
t
pLH(P)MIN
⎯ 250 600 950 ns
t
pHL(P)MIN
⎯
PHASE to OUT
250 600 950 ns
t
pLH(O)
⎯ 300 600 900 ns
Output transistor switching
characteristics
t
pHL(O)
⎯
CR(OSC) to OUT
350 650 950 ns
Blanking time for current
spike prevention
t
BLANK
⎯ I
OUT
= 1.0 A 200 300 500 ns
CR oscillation reference
frequency
f
CR
⎯ C
osc
= 270 pF, R
osc
= 3.6 kΩ 1200 1600 2000 kHz
Chopper frequency range f
chop(RANGE)
⎯
V
M
= 24 V, outputs enabled,
(
I
OUT
= 1.0 A)
40 100 150 kHz
Predefined chopper
frequency
f
chop
⎯
Outputs enabled (I
OUT
= 1.0 A),
OSCM = 1600 kHz
– 100 – kHz
ISD masking time tISD(Mask) AC – 4 – –
ISD on-time tISD AC
The number of OSCM pulse.
Until it detects over-current after
output current exceeds an ISD
threshold value by short-circuit to
VM or GND to output.
4 – 8 –
OSC_M frequency can be calculated by the following approximate formula.
Please give as a reference of frequency adjustment.
………C
、
R
1
: The external constant for OSCM
(C=270pF、R
1
=3.6k on an application circuit diagram)
)500(6.0
1
1
+××
=
RC
f
OSCM
