The M62216FP is designed as low voltage operation STEP-UP
DC-DC converter.
This IC can operate very low input voltage (over 0.9V) and low
power dissipation (circuit current is less than 850µA).
So, this IC suitable for power supply of portable system that
using low voltage battery (DRY battery, rechargeable battery).
FEATURES
• Pre-Drive type PWM output (Pre-Drive only)
• Low voltage Operation • • • • • • • • • • • • VIN=0.9V min.
ABSOLUTE MAXIMUM RATINGS (Ta=25°C , unless otherwise noted)
Symbol
VIN
VBIAS
VDRIVE1
VDRIVE2
IDRIVE1
IDRIVE2
Pd
Topr
Tstg
Input Voltage
Bias Terminal Supply Voltage
Drive1 Terminal Supply Voltage
Drive2 Terminal Supply Voltage
Drive1 Terminal Input Current
Drive2 Terminal Input Current
Power Dissipation
Operating Temperature
Storage Temperature
*1 : Setting range of BIAS voltage as same as setting range of output voltage .
VBIAS
IB
IB(OFF)
VREF∆VREF
IIN
AV
IFB+
IFB-
fosc
DUTYmax
Vsat1
Vsat2
IL1
IL2
VPWM(L)
ION
VTH(ON)
Input Voltage Range
BIAS Voltage Setting Range *1
BIAS Current
BIAS Current at OFF Mode
Reference Voltage
BIAS Voltage Regulation of VREF
Input Current
Open Loop Voltage Gain
FB Terminal Sink Current
FB Terminal Source Current
Oscillation Frequency
Maximum ON Duty
Saturation Voltage between
PWM Term. and DRIVE1 Term.
Saturation Voltage between
PWM Term. and DRIVE2 Term.
Leak Current of DRIVE1 Terminal
Leak Current of DRIVE2 Terminal
Output Low Voltage of PWM Terminal
Input Current of ON/OFF Terminal
At ON Status
Threshold Voltage of ON/OFF
Terminal
Use internal amp as Buffer-amp
VBIAS=1.7~15V
IN = 1V / IM
fIN = 100Hz , Null Amp Operation
IN = 1.4V , FB = 1.25V / IM
IN = 1.1V , FB = 1.25V / IM
PWM Terminal Monitored
*1, *2 : These characteristics show the maximum output load current when start-up.
Therefore, output voltage can grown-up to setting voltage less than a curve in the
graph when using these external components value.
( • 2SC3052-F : hFE=250 ~ 500, 2SC3439-H : hFE=600 ~ 1200)
( / 8 )
7
Equation for Constants Calculation
MITSUBISHI SEMICONDUCTOR<STD-Linear IC>
M62216FP/GP
Low Voltage Operation STEP-UP DC-DC Converter
Constants
TON
TOFF
TON+TOFF
TOFF(MIN)
TON(MAX)
Ipk
L(MIN)
R1
RD1
RD2
Standard Application Circuit
VO + VF - VIN
VIN - VCE(sat)
1
fosc
TON + TOFF
TON
1 +
TOFF
1
- TOFF(MIN)
fosc
2 * 1 + * (Io + IB)
(VIN - VCE(sat))
TON
TOFF
2
* TON(MAX)
2 * Vo * (Io + IB)
Vo
- 1 * R2
VREF
Vo - (VBE + Vsat1)
(Ipk / hFE) * A1
Vo - (VBE + Vsat2)
(Ipk / hFE) * A2
2
* fosc
Application Circuit 1Application Circuit 2
VO + VF - VIN
VIN - VCE(sat)
VO + VF - VIN
VIN - VCE(sat)
1
fosc
TON + TOFF
TON
1 +
TON + TOFF
1 +
TOFF
1
- TOFF(MIN)
fosc
2 * 1 + * Io
(VIN - VCE(sat))
TON
TOFF
2
* TON(MAX)
2 * Vo * Io
Vo
VREF
Vo - (VBE + Vsat1)
(Ipk / hFE) * A1
Vo - (VBE + Vsat2)
(Ipk / hFE) * A2
- 1 * R2
2
* fosc
1
fosc
2 * 1 + * Io
(VIN - VCE(sat))
Vo
VREF
VIN - (VBE + Vsat1)
(Ipk / hFE) * A1
VIN - (VBE + Vsat2)
(Ipk / hFE) * A2
1
fosc
TON
TOFF
- TOFF(MIN)
TON
TOFF
2
* TON(MAX)
2 * Vo * Io
- 1 * R2
2
* fosc
Constants
TON
TOFF
TON+TOFF
TOFF(MIN)
TON(MAX)
Ipk
L(MIN)
R1
RD1
RD2
STEP-DOWN Circuit
VO + VF
VIN - VCE(sat) - Vo
1
fosc
TON + TOFF
TON
1 +
TOFF
1
- TOFF(MIN)
fosc
2 * Io
(VIN - VCE(sat) - Vo) * TON(MAX)
∆Io
Vo
- 1 * R2
VREF
Vo - VBE - Vsat1
Ipk / hFE
VIN - Vsat2
(Ipk / hFE) * A3
Notice)
• VF : Forward voltage of external diode.
• VCE(sat) : Saturation voltage of external transistor.
• VBE : Voltage between Base - Emitter of external transistor.
• hFE : hFE of external transistor at saturating.
• A1 : Ratio of current into DRIVE1 terminal.
(A1 = 0.8 ~ 0.9)
• A2 : Ratio of current into DRIVE2 terminal.
(A2 = 1 - A1)
• A3 : Ratio of current into DRIVE2 terminal.
(A3 = 0.1 ~ 0.2)
• Set R2 to several KΩ ~ several 10ths kΩ.
• Set current into DRIVE2 terminal more than 100µA.
(Ipk / hFE) * A2 ≥ 100µA, (Ipk / hFE) * A3 ≥ 100µA,.
• Set ∆Io to 1/ 5 ~ 1/ 3 of maximum load current.
• The maximum rating of current of external parts (transistor,
diode and inductor) are 1.5 to 2 times of Ipk.
( / 8 )
8
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.