LA7848 [SANYO]
TV Vertical Output + E/W Driver with Bus Control Support; 电视垂直输出+ E / W驱动器，带有总线控制支持
| 型号： | LA7848 |
| 厂家： | 
SANYO SEMICON DEVICE |
| 描述： | TV Vertical Output + E/W Driver with Bus Control Support |
| 文件： | 总6页 (文件大小：282K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : ENN7877
Monolithic Linear IC
TV Vertical Output + E/W Driver
with Bus Control Support
LA7848
Overview
The LA7848 is a vertical deflection plus EW driver IC for high image quality TV and CRT displays that supports the use
of a bus control system signal-processing IC. The sawtooth waveform from the bus control system signal-processing IC
can directly drive the deflection yoke (including the DC component). The LA7848 also provides a parabolic waveform
output that can similarly be used to drive the diode modulator block.
Functions
• Built-in pump-up circuit for low power dissipation.
• Vertical output circuit.
• Excellent crossover characteristics.
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Supply voltage
Symbol
+B6 max
Conditions
Ratings
Unit
V
45
92
9
Output block supply voltage
Allowable power dissipation
Deflection output current
EW drive current *1
+B3 max
Pd max
I2 max
I10 max
V10 max
θj-c
V
W
Mounted on an arbitrarily large heat sink.
-1.5 to +1.5
+0.5
Ap-o
Ap-o
V
V10 = 1.5V
EW drive voltage *2
I10 = 10µA
45
Thermal resistance
4
°C /W
°C
Operating temperature
Storage temperature
Topr
-20 to +85
-40 to +150
Tstg
°C
Note: The EW driver is used within the range that connects the two points *1 and *2.
90705 MS OT B8-5526 No.7877-1/6
LA7848
Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
Recommended supply voltage
Operating supply voltage range
Deflection output current
EW drive current
+B6
30
+B6op
I2p-p
I10
16 to 43
To 2.2
To 0.4
V
Ap-p
Ap-o
Operating Characteristics at Ta = 25°C, +B = 30V
Ratings
Parameter
Symbol
Vsat2-1
Conditions
Unit
min
typ
max
1.5
Deflection output saturation
voltage (lower)
I2 = 1.1A
I2 = -1.1A
I7 = 20mA
I7 = -1.1A
V
V
V
V
Deflection output saturation
voltage (upper)
Vsat3-2
Vsat7-1
Vsat6-7
3.2
1.8
3.2
Pump-up charge saturation
voltage
Pump-up discharge saturation
voltage
Idling current
Idl
15
14.0
50
16.0
1.5
mA
V
Midpoint voltage
Vmid
Vsat10-1
15.0
EW drive saturation voltage
I10 = 500mA
V
Note: Current flowing into the IC is positive (+) and current flowing out is negative (-).
Package Dimensions
unit : mm
3248A
No.7877-2/6
LA7848
Block Diagram
Test Circuit Diagrams
1. Output saturation voltage (lower) Vsat2-1
Figure 1
In the circuit in figure 1, read the value shown by the voltage meter (V) when the current meter (A) reads 1.1A.
No.7877-3/6
LA7848
2. Output saturation voltage (upper) Vsat3-2
Figure 2
In the circuit in figure 2 with the output from pin 2 absorbed by an electronic load and read the value shown by the
voltage meter (V) when the current meter (A) reads 1.1A.
3. Charge pump charge saturation voltage Vsat7-1
Figure 3
In the circuit in figure 3, read the value shown by the voltage meter (V) when the current meter (A) reads 20mA.
No.7877-4/6
LA7848
4. Charge pump discharge saturation voltage Vsat6-7
Figure 4
In the circuit in figure 4 with the output from pin 7 absorbed by an electronic load, read the value shown by the
voltage meter (V) when the current meter (A) reads 1.1A.
7. Idling current Idl
8. Midpoint voltage Vmid
Figure 5
In the circuit in figure 5, read the value shown by the current meter (A).
In the circuit in figure 5, read the value shown by the voltage meter (V).
No.7877-5/6
LA7848
9. EW drive saturation voltage Vsat10-1
Figure 6
In the circuit in figure 6, read the value shown by the voltage meter (V) when the current meter (A) reads 500mA.
! Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer's
products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
! SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could give
rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that
could cause damage to other property. When designing equipment, adopt safety measures so that these
kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits
and error prevention circuits for safe design, redundant design, and structural design.
! In the event that any or all SANYO products (including technical data, services) described or contained
herein are controlled under any of applicable local export control laws and regulations, such products
must not be exported without obtaining the export license from the authorities concerned in accordance
with the above law.
! No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system, of
otherwise, without the prior written permission of SANYO Electric Co., Ltd.
! Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for
the SANYO product that you intend to use.
! Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no
guarantees are made or implied regarding its use or any infringements of intellectual property rights or
This catalog provides information as of September, 2005. Specifications and information herein are subject
to change without notice.
PS No.7877-6/6
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