S-8335A160FT-TB-G Seiko Instruments, S-8335A160FT-TB-G Datasheet - Page 17

• Manufacturer Part Number: S-8335A160FT-TB-G
• Description: IC REG SW 3CH STEP UP 24-TSSOP
• Manufacturer: Seiko Instruments
• Type: Step-Up (Boost), Invertingr

Specifications of S-8335A160FT-TB-G

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 7.48 ~ 13.93 V, -5.44 ~ -10.13 V
• Frequency - Switching: 100kHz
• Voltage - Input: 2.4 ~ 5 V
• Operating Temperature: -20°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Power - Output: 650mW
• Output Voltage: 13.93 V
• Operating Temperature Range: - 20 C to + 70 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Rev.6.0
During t
-V
lowest value after time t
diode to C
maximum value (ripple voltage: V
load current I
This ripple voltage value is calculated below.
I
Since I
(23):
The following is obtained by substituting equation (26) into equation (25):
The amount of electric charge
The following is obtained by substituting equation (25) into equation (28)
The voltage rise (V
OUT
OUT
_01
when the time from immediately after t
∴
I
t
∆
=
∆
V
, the capacitor (C
V
1
OUT
Q
Q
OUT
I
P-P
L
t
=
STEP-UP, FOR LCD BIAS SUPPLY, 3-CHANNEL SWITCHING REGULATOR
PK
ON
1
=0 at time t
1
1
t
=
=
=
L
=
OFF
, the energy is stored in L and not transmitted to −V
•
+
OUT
(
∫
I
t
I
0
I
t
=
PK
1
V
PK
1
PK
−
−
OUT
D
I
C
, and the C
−
∆



OUT
−
V
−
OUT
=
Q
I
1
2



I
OUT
I
.
OUT
1
PK
OUT
t
V
I
(
OFF
dt
I
PK
L
OUT
PK
=
P-P
+
OFF



)
=
C
L
•
•
V
−
) due to



t
OUT
+
I
1
D
OUT
I
OFF
PK
V
(when all inductor energy was emitted), the following is obtained from equation
OUT
V
•
ON
OUT
D
•
1
2
OUT
) energy is used. As a result, the C
•
∫



)
. When M1 is turned off, the energy stored in L is transmitted through the
0



L
t
t
•
1
•
1
+
I
2
t
t
PK
1
1
∆
pin voltage rises dramatically. V
V
dt
......................................................................................................
......................................................................................................
∆
......................................................................................................
=
Q
.....................................................................................................
D
+
Q
2
−
I



1
I
PK
1
OUT
is as follows:
................................................................................................
V
P-P
charged in C
OUT
+
2
Seiko Instruments Inc.
) when the current flowing through the diode to V
I



L
OUT
•
+
t
1
V
•
D
ON
t
1
.................................................................................
•
∫
until V
0
t
1
............................................................................
t
OUT
dt
OUT
during time t
reaches its highest level is set to t
OUT
OUT
OUT
1
. When output current (I
:
pin voltage decreases and reaches its
is a time function that indicates the
S-8335 Series
OUT
OUT
1
:
matches the
) flows from
(24)
(25)
(26)
(27)
(28)
(29)
(30)
17