MCP14700-E/MF Microchip Technology, MCP14700-E/MF Datasheet - Page 13

• Manufacturer Part Number: MCP14700-E/MF
• Description: IC MOSFET DRIVER HIGH/LOW 8DFN
• Manufacturer: Microchip Technology
• Type: High and Low Side Gate Driverr

Specifications of MCP14700-E/MF

• Package / Case: 8-DFN
• Configuration: High and Low Side, Synchronous
• Input Type: Non-Inverting
• Delay Time: 27ns
• Current - Peak: 2A
• Number Of Configurations: 1
• Number Of Outputs: 2
• High Side Voltage - Max (bootstrap): 36V
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Product: MOSFET Gate Drivers
• Rise Time: 10 ns
• Fall Time: 10 ns
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Supply Current: 80 uA
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Maximum Turn-off Delay Time: 36 ns
• Maximum Turn-on Delay Time: 36 ns
• Minimum Operating Temperature: - 40 C
• Number Of Drivers: Single
• Output Current: 2000 mA
• Output Voltage: 0.025 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

5.0
5.1
The selection of the bootstrap capacitor is based upon
the total gate charge of the high-side power MOSFET
and the allowable droop in gate drive voltage while the
high-side power MOSFET is conducting.
EQUATION 5-1:
For example:
A low ESR ceramic capacitor is recommend with a
maximum voltage rating that exceeds the maximum
input voltage, V
V
of C
5.2
Proper decoupling of the MCP14700 is highly
recommended to help ensure reliable operation. This
decoupling capacitor should be placed as close to the
MCP14700 as possible. The large currents required to
quickly charge the capacitive loads are provided by this
capacitor.
recommended.
© 2009 Microchip Technology Inc.
Where:
SUPPLY
ΔV
BOOT
Q
ΔV
C
C
Q
DROO
GATE
BOOT
BOOT
GATE
DROOP
. It is also recommended that the capacitance
APPLICATION INFORMATION
Bootstrap Capacitor Select
Decoupling Capacitor
does not exceed 1.2 uF.
= 30 nC
≥ 0.15 uF
A
= Bootstrap capacitor value
= Total gate charge of the high-side
= Allowable gate drive voltage droop
C
= 200 mV
CC
BOOT
low
MOSFET
, plus the maximum supply voltage,
ESR
≥
---------------------------- -
Δ
V
Q GATE
DROOP
ceramic
capacitor
is
5.3
The power dissipated in the MCP14700 consists of the
power loss associated with the quiescent power and
the gate charge power.
The quiescent power loss can be calculated by the
following equation and is typically negligible compared
to the gate drive power loss.
EQUATION 5-2:
The main power loss occurs from the gate charge
power loss. This power loss can be defined in terms of
both the high-side and low-side power MOSFETs.
EQUATION 5-3:
Where:
Where:
P
P
HIGHDR
LOWDR
P
Q
Q
I
V
VCC
GATE
HIGH
F
P
V
LOW
CC
P
SW
P
Q
CC
HIGHDR
Power Dissipation
LOWDR
P GATE
= Quiescent power loss
= No Load Bias Current
= Bias Voltage
= Total Gate Charge Power Loss
= High-Side Gate Charge Power Loss
= Low-Side Gate Charge Power Loss
= Bias Supply Voltage
= High-Side MOSFET Total Gate
= Low-Side MOSFET Total GAte
= Switching Frequency
Charge
Charge
P Q
=
=
=
P HIGHDR
V
V
=
CC
CC
I VCC V CC
MCP14700
×
×
Q
Q
HIGH
LOW
×
+
P LOWDR
×
DS22201A-page 13
×
F
F
SW
SW