EZ1900 Datasheet, PDF (3/5 Pages) Semtech Corporation – REGULATOR BALANCE CONTROLLER

REGULATOR
BALANCE CONTROLLER
EZ1900
May 27, 1999
V_OUT/RESISTOR SELECTION REFERENCE
(Resistor selection in Ω. See Typical Applications on following pages.)
Slave Mode (Master Regulator) V_M
V_OUT
3.500
3.300
2.900
2.800
2.700
2.600
2.500
R3
R4
130 232
115 187
133 174
137 169
137 158
121 130
115 115
Calc V_OUT
3.494
3.293
2.895
2.801
2.700
2.600
2.506
Notes:
V_M = V_REF (1 + R4 / R3) + I_ADJ R4.
Resistor selection is based upon standard table for 1%
resistors.
Non-Slave Mode (Slave Regulator) V_S
V_OUT
3.500
3.300
2.900
2.800
2.700
2.600
2.500
R1
R2
137 243
137 221
137 178
124 150
130 147
121 127
133 137
*Calc V_OUT
3.508
3.306
2.911
2.801
2.701
2.600
2.498
Notes:
V_S = V_REF (1 + (R2 + 3Ω) / R1) + I_ADJ (R2 + 3Ω).
*The EZ1900 operating in the non-slave mode opera-
tion will introduce approximately 3 ohms of resistance
in the voltage set path when selected. The calculated
values are based upon this addition.
TYPICAL APPLICATIONS
Balanced Current Controller Utilizing EZ108X/EZ158X Series
Voltage Select
Slave Mode Operation V_M = V_OUT of Master
V_M = V_REF (1 + R4/R3) + I_ADJ R4
Non-Slave Mode, V_S = V_OUT of Slave
V_S = V_REF (1 + (R2 + 3Ω) / R1) + I_ADJ (R2 + 3Ω)
© 1999 SEMTECH CORP.
R_SENSE Select
R_SENSE Select; Typical selection can be
(50mV to 100mV) / (Total I_OUT / 2).
Trace resistance of 10mΩ and above can easily accomodate value
required.
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