Rainbow Electronics MAX1585 - Manual (Page 26)

MAX1584/MAX1585
Adding a MAX1801 Slave
The MAX1801 is a 6-pin SOT slave DC-DC controller
that can be connected to generate additional output
voltages. It does not generate its own reference or
oscillator. Instead, it uses the reference and oscillator
of the MAX1584/MAX1585 (Figure 12).
5-Channel Slim DSC Power Supplies
26 ______________________________________________________________________________________
DL2
FB2
REF
AUX2
INVERTING
PWM
INDL2
-7.5V
100mA
TO V
BATT
R
TOP
R
REF
MAX1585
(PARTIAL)
Figure 8. Regulated -7.5V Negative CCD Bias Provided by
Conventional Inverter (MAX1585 Only)
MAX1584
MAX1585
(PARTIAL)
AUX_
PWM
PVSU
DL_
FB_
C2
1 µF
TO V BATT
1 µF
L1
10 µH D2
R1
1M
Ω
R2
90.9k Ω
C1
1 µF D3
D1
Q1
C3
1
µF
V OUT+
+15V
20mA
V OUT-
-15V
10mA
NOTE: THIS CIRCUIT CAN OPERATE WITH AUX1
OR AUX2 ON THE MAX1584, AND WITH AUX1 ON THE MAX1585.
Figure 9. ±15V Output from AUX-Driven Boost with Charge-
Pump Inversion
MAX1584/MAX1585
(PARTIAL)
AUX_
PWM
PVSU
DL_
FB_
TO V BATT
MAX1616
FB_
GND
SHDN IN
OUT
+1.25V
+15V
20mA
-7.5V
20mA
NOTE: THIS CIRCUIT CAN OPERATE WITH AUX1
OR AUX2 ON THE MAX1584, AND WITH AUX1 ON THE MAX1585.
Figure 10. +15V and -7.5V CCD Bias Without Transformer from
AUX-Driven Boost and Charge Pump. A positive linear regula-
tor (MAX1616) regulates the negative output of the charge
pump.
Q1
C2
D1
R1
OUTPUT
3.3V
L1
R2
V SU
PV PVSU
PART OF
MAX1584
MAX1585
(PARTIAL)
DL_
FB_
INPUT
1-CELL
Li+
L2
NOTE: THIS CIRCUIT CAN OPERATE WITH AUX1
OR AUX2 ON THE MAX1584, AND WITH AUX1 ON THE MAX1585.
Figure 11. SEPIC Converter for Additional Boost-Buck Channel