MB39A214APFT-G-JNERE1 Datasheet, PDF (21/56 Pages) Fujitsu Component Limited. – 2ch DC/DC converter IC with PFM/ PWM synchronous rectification

MB39A214A
y Enable function table
EN1 pin
EN2 pin
L
L
H
L
L
H
H
H
DC/DC converter (CH1)
OFF
ON
OFF
ON
DC/DC converter (CH2)
OFF
OFF
ON
ON
y DC/DC Control mode function table
MODE pin
GND connection
OPEN
VB connection
DC/DC control
Automatic PFM/PWM selection mode
Automatic PFM/PWM selection mode with PAF function
PWM-fixed mode
y Switching frequency control function table
FREQ pin
GND connection
OPEN
VB connection
Switching frequency
f_OSC1
f_OSC1
f_OSC1
230 kHz, f_OSC2
460 kHz, f_OSC2
750 kHz, f_OSC2
310 kHz
620 kHz
1000 kHz
y Protection function table
The following table shows the state of the VB pin (pin 18), the DRVH1 pin (pin 24), the DRVH2 pin (pin
13), the DRVL1 pin (pin 22), the DRVL2 pin (pin 15) when each protection function operates.
Protection
function
Under Voltage
Lockout Protection
(UVLO)
Over-current
limitation
(ILIM)
Over Voltage
Protection
(OVP)
Under Voltage
Protection
(UVP)
Over Temperature
Protection
(OTP)
Enable
(EN)
Detection condition
VB < 4.0 V
Output of each pin
after detection
VB
DRVH1, DRVL1,
DRVH2 DRVL2
DC/DC output
dropping operation
—
L
L
Natural electric
discharge
V_PGND - V_LX1, V_LX2 >
V_ILIM1, V_ILIM2
5.2 V
Switching
Switching
The voltage is dropped
by the constant current
V_FB1, V_FB2 >
INTREF1, INTREF2¯1.15 5.2 V
L
(15 µs or higher)
V_FB1, V_FB2 >
INTREF1, INTREF2¯0.7 5.2 V
L
(150 µs or higher)
H 0 V clamping
L
Electrical discharge by
discharge function
Tj > + 150 °C
5.2 V
L
L
Electrical discharge by
discharge function
EN1, EN2: H → L
5.2 V
L
(V_OUT1, V_OUT2 > 0.2 V)
L
Electrical discharge by
discharge function
DS405-00007-1v0-E
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