Datasheet

TPS61000, TPS61001, TPS61002, TPS61003, TPS61004, TPS61005, TPS61006, TPS61007
SINGLE- AND DUAL-CELL BOOST CONVERTER WITH START-UP INTO FULL LOAD
SLVS279C – MARCH 2000 – REVISED APRIL 2003
18
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
Resistor R
C
and capacitor C
C2
depend on the chosen inductance. For a 33-µH inductor, the capacitance of C
C2
should be chosen to 33 nF, or in other words, if the inductor is xx µH, the chosen compensation capacitor should
be xx nF, the same number value. The value of the compensation resistor is then chosen based on the require-
ment to have a time constant of 0.3 ms for the R/C network of R
C
and C
C2
; hence for a 33-nF capacitor, a 10-kΩ
resistor should be chosen for R
C
.
Capacitor C
C1
is depending on the ESR and capacitance value of the output capacitor, and on the value chosen
for R
C
. Its value is calculated using following equation:
C
C1
+
C
O
x ESR
COUT
3 R
C
(7)
For a selected output capacitor of 22 µF with an ESR of 0.2 Ω, and R
C
of 33 kΩ, the value of C
C1
is in the range of
100 pF.
Table 3. Recommended Compensation Components
INDUCTOR
OUTPUT CAPACITOR
R
C
C
INDUCTOR
[µH]
CAPACITANCE
[µF]
ESR
[Ω]
R
C
[kΩ]
C
C1
[pF]
C
C2
[nF]
33 22 0.2 10 100 33
22 22 0.3 15 100 22
10 22 0.4 33 100 10
10 10 0.1 33 100 10
schematic of TPS6100x evaluation modules (TPS6100xEVM–156)
LBO
LBI
NC/FBGND
SW
V
BAT
EN
COMP
FB
GND
V
OUT
R6
LP1
D1
L1
C1 C3
R2 R1
IN
J1
C6
R5
C5
R3
C2
R4
OUT
TPS6100x
Evaluation modules are available for device types TPS61000, TPS61002, TPS61003, and TPS61006.