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Details, datasheet, quote on part number:S-8335A200FT
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| Part: | S-8335A200FT |
| Category: | Power Management => Regulators => Switching Regulators |
| Description: | Control Method = 3-channel For LCD ;; Operation Start Voltage = (Input 2.4-5V) ;; Output Voltage = Maximum 12.41-16.59V) ;; Output Accuracy = - ;; Switching Frequency = 100 KHZ ;; Current Consumption Operating = 100 µA (Mode 1, Vbat=3V) ;; Current Consumption Shutdown = 1 µA (Mode 3, Vbat=3V) ;; Efficiency Typ. = 82% ;; Package = 24-pin Tssop |
| Company: | Seiko Instruments |
| Datasheet: | Download S-8335A200FT datasheet File size : 410 kB |
| Request For quote: | Find where to buy S-8335A200FT
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Datasheet text preview:
Rev.5.2
Positive and Negative Voltage Three-channel Switching Regulator for LCD Bias Supply
S-8335 Series
The S-8335 Series is a bias supply IC for a Multi Line Addressing (MLA) driven LCD using a dual-line simultaneous selection mode. This IC supports medium-sized LCD panels. Two step-up type and one inverter type PFM control CMOS switching regulators supply the required positive or negative power to the two MLA-driven LCD common drivers and segment drivers. Because of its CMOS structure, the current consumption of the S8335 Series is extremely low, which makes it ideal for the LCD power supply of portable equipment that requires low power consumption. Also, an extremely low power consumption LCD module can be created by using 1 the S-8335 Series with the LCD common driver (HD66523R : 1 Manufactured by Hitachi, Ltd.) and segment driver (HD66522 : Manufactured by Hitachi, Ltd.).
1:These drivers are able to support 1/240duty and 1/200duty.
Features
· Supports four types of LCD panels (1/240 duty, 1/200 duty, 1/160 duty, and 1/120 duty). · Input voltage range: 2.4 to 5.0 V (The S-8335 can be driven by a single direct-coupled lithium battery.) · Output voltage range Common driver positive power supply (VRH) output voltage range(typ.value) 8.91 to 16.59 V (S-8335A240FT) 8.22 to 15.30 V (S-8335A200FT) 7.48 to 13.93 V (S-8335A160FT) 6.66 to 12.41 V (S-8335A120FT) (This supply can be varied by on-chip 6-bit electric volume. Power MOSFET is built in.) Common driver negative power supply (VRL) output voltage range(typ.value) -6.87 to -12.80 V (S-8335A240FT) -6.18 to -11.49 V (S-8335A200FT) -5.44 to -10.13 V (S-8335A160FT) -4.61 to -8.59 V (S-8335A120FT) Segment driver positive power supply (VCH) output voltage range 2.0 to 3.8 V Segment driver intermediate potential (VM) output voltage range 1.0 to 1.9 V Icon positive power supply (VICON) output voltage range 1.0 to 2.2 V (This supply can be set arbitrarily by external resistors.) · Low current consumption 100 µA typ. (mode 1, VBAT = 3 V) 10 µA typ. (mode 2, VBAT = 3 V) 1 µA max. (mode 3, VBAT = 3 V) · Triple operation mode function: Triple mode switching according to 2-bit input Mode 1: Normal operation Mode 2: Icon mode (reference voltage circuit- and regulator S-only operation) Mode 3: Standby mode (power off) · Power-off function Stops step-up or step-down operation and short circuits VRH and VRL to VSS by on-chip and external Nch transistors. · Soft-start function: This function can be set according to an external capacitor (CSS). · Oscillation frequency: 100 kHz ± 20 kHz, Duty = 50%
Applications
· Power supply for medium-sized LCD panel
Package Name
· 24-pin TSSOP package (PKG diagram code: FT024-A) Seiko Instruments Inc. 1
Positive and Negative Voltage Three-channel Switching Regulator for LCD Bias Supply S-8335 Series Rev.5.2 Block Diagram
L3 D3 CL3 VRH CL1 VSTR_B CONT1
L1
D1
A
VOUT1
CONT3
24 21
12 16
1
6
2
3
4
RESET
Electric volume
VBAT
5
DC/DC P
PFM control circuit
VOUT3
VCLK
VDIN
DC/DC U
PFM control circuit
R1
17
R2 MC1
DC/DC Q
Mode control circuit
PFM control circuit 14
23
VQERR VREFU
20
MC2
22 Reference voltage generation circuit
CREFU
op-amp X
Oscillator VDDX VXO
19 18
VCH
RE G S
RE G T
13
VM
VYO
VREGSF VREGSO VREGTF VREGTO 11 10 9 8 7
EXT2
15
op-amp Y
D2
CSS CRS1 VICON RS1 RS2 RT1 CRT1 RT2 F
VRL
L2
CL2
: small current VSS,
: large current VSS
Figure 1. Block Diagram Note: Except for op-amp X, all of the power for the internal circuits of the S-8335 Series is supplied by the VBAT pins. The power supply for op-amp X uses VOUT3, which is generated by stepping up VBAT using DC/DC U. Short-circuit the VOUT3 and VDDX pins as shown in the figure above.
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Seiko Instruments Inc.
Positive and Negative Voltage Three-channel Switching Regulator for LCD Bias Supply S-8335 Series Rev.5.2 Selection Guide
1. Product name
S-8335A XXX FT
Package name (abbreviation) Product type 240: 1/240 duty support 200: 1/200 duty support 160: 1/160 duty support 120: 1/120 duty support
2. Product list S-8335AXXXFT Series Bias Ratio Common Driver Positive Power Supply VRH Output Voltage Range [V] VRH_min S-8335A240FT S-8335A200FT S-8335A160FT S-8335A120FT 8.75 8.04 7.33 6.50 8.91 8.22 7.48 6.66 VRH_max 16.59 15.30 13.93 12.41 Common Driver Negative Power Supply VRL Output Voltage Range [V] VRL_min -6.87 -6.18 -5.44 -4.61 VRL_max -12.80 -11.49 -10.13 -8.59
Note: VRH_min and VRL_min indicate the typical value of the VRH and VRL output voltage, respectively, when the electric volume is set to the minimum, and VRH_max and VRL_max indicate the typical value of the VRH and VRL output voltage, respectively, when the electric volume is set to the maximum. Also, VRH_max is obtained from VRETGO × 7.136 and VRH_min is obtained from VRETGO × 3.832, where VRETGO is the regulator T output voltage.
Seiko Instruments Inc.
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