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参数资料
| 型号： | R1283Z1A-E2 |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 电源模块 |
| 英文描述： | DC-DC REG PWR SUPPLY MODULE |
| 封装： | 1.50 X 2.40 MM, WLCSP-11 |
| 文件页数： | 19/22页 |
| 文件大小： | 416K |
| 代理商： | R1283Z1A-E2 |
R1283x
6
TYPICAL APPLICATION
Step-up DC/DC converter output voltage setting
The output voltage VOUT1 of the step-up DC/DC converter is controlled with maintaining the VFB1 as 1.0V.
VOUT1 can be set with adjusting the values of R1 and R2 as in the next formula. VOUT1 can be set equal or
less than 20V.
VOUT1 = VFB1 x (R1+R2) / R1
Inverting DC/DC converter output voltage setting
The output voltage VOUT2 of the inverting DC/DC converter is controlled with maintaining the VFB2 as 0V.
VOUT2 can be set with adjusting the values of R4 and R5as in the next formula.
VOUT2 = VFB2 - (VREF-VFB2) x R5 / R4
Auto Discharge Function
When CE level turns from ‘H’ to ‘L’ level, the R1283 goes into standby mode and switching of the outputs of
LX1 and LX2 will stop. Then dischage Tr. between VOUT2 and VCC turns on and discharges the negative
output voltage. When the negative output voltage is discharged to 0V, the Tr. turns off and the negative
output will be Hi-Z.
When the Auto discharge function is unnecessary ,VOUTN connect to VCC or make be Hi-Z.
PGND
LX1
VCC
VFB1
VOUT1
VREF
LX2
PVCC
VFB2
VOUT2
CE
GND
EN
VOUTN
L1
R2
R1
R5
R4
R3
R6
C1
C2
C3
C5
C6
C4
L2
D1
D2
C1B
CE
Negative output
0V
Discharge
Hi-Z
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