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Schematic of Passive Components Sizing: BRAVE POWER MANAGEMENT BOARD fb1c
New Comment
1
From the datasheet of U1 obtain equations used to set the output voltage to 3.3...
2
J3
R9
Resistance
20kΩ
R8
Resistance
2kΩ
R7
Resistance
Resistance
R1
Resistance
3kΩ
R2
Resistance
1k5 Ω
R4
Resistance
4k7 Ω
R3
Resistance
Resistance
R5
Resistance
6k8 Ω
SETTING OUTPUT VOLTAGE
Line 1
------------------------------------------------------------
Line 2
The internal reference VREF is typically 0.6V. The output voltage is divided by a resistor divider,R1 and R2 to the FB pin.
Line 3
Vout = Vref x (1 + R6/R9)
Line 4
------------------------- AND ---------------------------
Line 5
Vout = Vref x (1 + R6/(R1+R4))
U4
SW1
IC2
D1
J1
D5
Color
Red
D2
Color
Green
J4
D3
J2
U1
U3
C1
Capacitance
10uF
C4
Capacitance
4u7 F
C2
Capacitance
10uF
C3
Capacitance
100nF
C8
Capacitance
Capacitance
C9
Capacitance
100nF
C6
Capacitance
100nF
C5
Capacitance
10uF
L2
Inductance
Inductance

Passive Components Sizing: BRAVE POWER MANAGEMENT BOARD fb1c